25011491 has 4 divisors (see below), whose sum is σ = 25151400. Its totient is φ = 24871584.

The previous prime is 25011487. The next prime is 25011499. The reversal of 25011491 is 19411052.

It is a happy number.

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 25011491 - 2² = 25011487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25011499) 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, 69686 + ... + 70043.

It is an arithmetic number, because the mean of its divisors is an integer number (6287850).

Almost surely, 2^25011491 is an apocalyptic number.

25011491 is a deficient number, since it is larger than the sum of its proper divisors (139909).

25011491 is a wasteful number, since it uses less digits than its factorization.

25011491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139908.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 25011491 is about 5001.1489679873. The cubic root of 25011491 is about 292.4465668095.

The spelling of 25011491 in words is "twenty-five million, eleven thousand, four hundred ninety-one".