25491359 has 4 divisors (see below), whose sum is σ = 25729704. Its totient is φ = 25253016.

The previous prime is 25491329. The next prime is 25491371. The reversal of 25491359 is 95319452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25491359 - 2¹⁶ = 25425823 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 (25491329) 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, 119012 + ... + 119225.

It is an arithmetic number, because the mean of its divisors is an integer number (6432426).

Almost surely, 2^25491359 is an apocalyptic number.

25491359 is a deficient number, since it is larger than the sum of its proper divisors (238345).

25491359 is a wasteful number, since it uses less digits than its factorization.

25491359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238344.

The product of its digits is 48600, while the sum is 38.

The square root of 25491359 is about 5048.8968101953. The cubic root of 25491359 is about 294.3050153305.

The spelling of 25491359 in words is "twenty-five million, four hundred ninety-one thousand, three hundred fifty-nine".