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1201213 = 1392401
BaseRepresentation
bin100100101010000111101
32021000202101
410211100331
5301414323
641425101
713132036
oct4452075
92230671
101201213
11750542
1249b191
133309a0
14233a8d
1518adad
hex12543d

1201213 has 4 divisors (see below), whose sum is σ = 1293628. Its totient is φ = 1108800.

The previous prime is 1201201. The next prime is 1201217. The reversal of 1201213 is 3121021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3121021 = 26311867.

It can be written as a sum of positive squares in 2 ways, for example, as 643204 + 558009 = 802^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201213 - 29 = 1200701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46188 + ... + 46213.

It is an arithmetic number, because the mean of its divisors is an integer number (323407).

21201213 is an apocalyptic number.

1201213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1201213 is a deficient number, since it is larger than the sum of its proper divisors (92415).

1201213 is an equidigital number, since it uses as much as digits as its factorization.

1201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92414.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1201213 is about 1095.9986313860. The cubic root of 1201213 is about 106.3016505506.

Adding to 1201213 its reverse (3121021), we get a palindrome (4322234).

The spelling of 1201213 in words is "one million, two hundred one thousand, two hundred thirteen".

Divisors: 1 13 92401 1201213