13425557 has 4 divisors (see below), whose sum is σ = 13460460. Its totient is φ = 13390656.

The previous prime is 13425547. The next prime is 13425569. The reversal of 13425557 is 75552431.

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 7789681 + 5635876 = 2791^2 + 2374^2 .

It is a cyclic number.

It is not a de Polignac number, because 13425557 - 2⁸ = 13425301 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 (13425547) 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, 16868 + ... + 17645.

It is an arithmetic number, because the mean of its divisors is an integer number (3365115).

Almost surely, 2^13425557 is an apocalyptic number.

It is an amenable number.

13425557 is a deficient number, since it is larger than the sum of its proper divisors (34903).

13425557 is an equidigital number, since it uses as much as digits as its factorization.

13425557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34902.

The product of its digits is 21000, while the sum is 32.

The square root of 13425557 is about 3664.0902008548. The cubic root of 13425557 is about 237.6716808539.

Adding to 13425557 its reverse (75552431), we get a palindrome (88977988).

The spelling of 13425557 in words is "thirteen million, four hundred twenty-five thousand, five hundred fifty-seven".