13155457 has 4 divisors (see below), whose sum is σ = 15034816. Its totient is φ = 11276100.

The previous prime is 13155449. The next prime is 13155487. The reversal of 13155457 is 75455131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75455131 = 311 ⋅242621.

It is a cyclic number.

It is not a de Polignac number, because 13155457 - 2³ = 13155449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155427) 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, 939669 + ... + 939682.

It is an arithmetic number, because the mean of its divisors is an integer number (3758704).

Almost surely, 2^13155457 is an apocalyptic number.

It is an amenable number.

13155457 is a deficient number, since it is larger than the sum of its proper divisors (1879359).

13155457 is an equidigital number, since it uses as much as digits as its factorization.

13155457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879358.

The product of its digits is 10500, while the sum is 31.

The square root of 13155457 is about 3627.0452161505. The cubic root of 13155457 is about 236.0670174987.

The spelling of 13155457 in words is "thirteen million, one hundred fifty-five thousand, four hundred fifty-seven".