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1200013 = 1770589
BaseRepresentation
bin100100100111110001101
32020222002221
410210332031
5301400023
641415341
713125403
oct4447615
92228087
101200013
1174a651
1249a551
13330289
14233473
1518a85d
hex124f8d

1200013 has 4 divisors (see below), whose sum is σ = 1270620. Its totient is φ = 1129408.

The previous prime is 1200007. The next prime is 1200061. The reversal of 1200013 is 3100021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 619369 + 580644 = 787^2 + 762^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200013 - 213 = 1191821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1199969 and 1200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35278 + ... + 35311.

It is an arithmetic number, because the mean of its divisors is an integer number (317655).

21200013 is an apocalyptic number.

It is an amenable number.

1200013 is a deficient number, since it is larger than the sum of its proper divisors (70607).

1200013 is an equidigital number, since it uses as much as digits as its factorization.

1200013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70606.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1200013 is about 1095.4510486553. The cubic root of 1200013 is about 106.2662406547.

Adding to 1200013 its reverse (3100021), we get a palindrome (4300034).

The spelling of 1200013 in words is "one million, two hundred thousand, thirteen".

Divisors: 1 17 70589 1200013