13250556 has 36 divisors (see below), whose sum is σ = 36540504. Its totient is φ = 4015200.

The previous prime is 13250537. The next prime is 13250557. The reversal of 13250556 is 65505231.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13250557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16335 + ... + 17126.

It is an arithmetic number, because the mean of its divisors is an integer number (1015014).

Almost surely, 2^13250556 is an apocalyptic number.

It is an amenable number.

13250556 is an abundant number, since it is smaller than the sum of its proper divisors (23289948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13250556 is a wasteful number, since it uses less digits than its factorization.

13250556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33482 (or 33477 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 13250556 is about 3640.1313163126. The cubic root of 13250556 is about 236.6344843718.

Adding to 13250556 its reverse (65505231), we get a palindrome (78755787).

The spelling of 13250556 in words is "thirteen million, two hundred fifty thousand, five hundred fifty-six".