13625491 has 4 divisors (see below), whose sum is σ = 14864184. Its totient is φ = 12386800.

The previous prime is 13625477. The next prime is 13625497. The reversal of 13625491 is 19452631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19452631 = 11 ⋅1768421.

It is a cyclic number.

It is not a de Polignac number, because 13625491 - 2⁹ = 13624979 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13625497) 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, 619330 + ... + 619351.

It is an arithmetic number, because the mean of its divisors is an integer number (3716046).

Almost surely, 2^13625491 is an apocalyptic number.

13625491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13625491 is a deficient number, since it is larger than the sum of its proper divisors (1238693).

13625491 is a wasteful number, since it uses less digits than its factorization.

13625491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238692.

The product of its digits is 6480, while the sum is 31.

The square root of 13625491 is about 3691.2722738915. The cubic root of 13625491 is about 238.8456780526.

The spelling of 13625491 in words is "thirteen million, six hundred twenty-five thousand, four hundred ninety-one".