25457403 has 4 divisors (see below), whose sum is σ = 33943208. Its totient is φ = 16971600.

The previous prime is 25457401. The next prime is 25457407. The reversal of 25457403 is 30475452.

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

It is not a de Polignac number, because 25457403 - 2¹ = 25457401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25457401) 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, 4242898 + ... + 4242903.

It is an arithmetic number, because the mean of its divisors is an integer number (8485802).

Almost surely, 2^25457403 is an apocalyptic number.

25457403 is a deficient number, since it is larger than the sum of its proper divisors (8485805).

25457403 is an equidigital number, since it uses as much as digits as its factorization.

25457403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485804.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 25457403 is about 5045.5329748204. The cubic root of 25457403 is about 294.1742800271.

The spelling of 25457403 in words is "twenty-five million, four hundred fifty-seven thousand, four hundred three".