25275391 has 4 divisors (see below), whose sum is σ = 25285984. Its totient is φ = 25264800.

The previous prime is 25275389. The next prime is 25275421. The reversal of 25275391 is 19357252.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25275391 - 2¹ = 25275389 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 (25275191) 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, 151 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (6321496).

Almost surely, 2^25275391 is an apocalyptic number.

25275391 is a deficient number, since it is larger than the sum of its proper divisors (10593).

25275391 is an equidigital number, since it uses as much as digits as its factorization.

25275391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10592.

The product of its digits is 18900, while the sum is 34.

The square root of 25275391 is about 5027.4636746574. The cubic root of 25275391 is about 293.4715196311.

The spelling of 25275391 in words is "twenty-five million, two hundred seventy-five thousand, three hundred ninety-one".