12551013 has 6 divisors (see below), whose sum is σ = 18129254. Its totient is φ = 8367336.

The previous prime is 12551009. The next prime is 12551017. The reversal of 12551013 is 31015521.

It is an interprime number because it is at equal distance from previous prime (12551009) and next prime (12551017).

It can be written as a sum of positive squares in only one way, i.e., 10381284 + 2169729 = 3222^2 + 1473^2 .

It is not a de Polignac number, because 12551013 - 2² = 12551009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 697270 + ... + 697287.

Almost surely, 2^12551013 is an apocalyptic number.

It is an amenable number.

12551013 is a deficient number, since it is larger than the sum of its proper divisors (5578241).

12551013 is a wasteful number, since it uses less digits than its factorization.

12551013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394563 (or 1394560 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 12551013 is about 3542.7408880696. The cubic root of 12551013 is about 232.3947216736.

Adding to 12551013 its reverse (31015521), we get a palindrome (43566534).

The spelling of 12551013 in words is "twelve million, five hundred fifty-one thousand, thirteen".