25298491 has 8 divisors (see below), whose sum is σ = 26588144. Its totient is φ = 24040800.

The previous prime is 25298489. The next prime is 25298501. The reversal of 25298491 is 19489252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(25298491) divides (25298491-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 25298491 - 2¹ = 25298489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25298191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6360 + ... + 9541.

It is an arithmetic number, because the mean of its divisors is an integer number (3323518).

Almost surely, 2^25298491 is an apocalyptic number.

25298491 is a deficient number, since it is larger than the sum of its proper divisors (1289653).

25298491 is a wasteful number, since it uses less digits than its factorization.

25298491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15981.

The product of its digits is 51840, while the sum is 40.

The square root of 25298491 is about 5029.7605310790. The cubic root of 25298491 is about 293.5608967899.

The spelling of 25298491 in words is "twenty-five million, two hundred ninety-eight thousand, four hundred ninety-one".