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BaseRepresentation
bin100100101010010110011
32021000220202
410211102303
5301420311
641425415
713132265
oct4452263
92230822
101201331
1175063a
1249b26b
13330a61
14233b35
1518ae3b
hex1254b3

1201331 has 4 divisors (see below), whose sum is σ = 1204152. Its totient is φ = 1198512.

The previous prime is 1201327. The next prime is 1201337. The reversal of 1201331 is 1331021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1331021 = 10311291.

It is a cyclic number.

It is not a de Polignac number, because 1201331 - 22 = 1201327 is a prime.

It is a super-2 number, since 2×12013312 = 2886392343122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201337) 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, 626 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (301038).

21201331 is an apocalyptic number.

1201331 is a deficient number, since it is larger than the sum of its proper divisors (2821).

1201331 is an equidigital number, since it uses as much as digits as its factorization.

1201331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1201331 is about 1096.0524622480. The cubic root of 1201331 is about 106.3051312500.

Adding to 1201331 its reverse (1331021), we get a palindrome (2532352).

The spelling of 1201331 in words is "one million, two hundred one thousand, three hundred thirty-one".

Divisors: 1 523 2297 1201331