25512403 has 4 divisors (see below), whose sum is σ = 29157040. Its totient is φ = 21867768.

The previous prime is 25512371. The next prime is 25512407. The reversal of 25512403 is 30421552.

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 25512403 - 2⁵ = 25512371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25512407) 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, 1822308 + ... + 1822321.

It is an arithmetic number, because the mean of its divisors is an integer number (7289260).

Almost surely, 2^25512403 is an apocalyptic number.

25512403 is a deficient number, since it is larger than the sum of its proper divisors (3644637).

25512403 is an equidigital number, since it uses as much as digits as its factorization.

25512403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644636.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 25512403 is about 5050.9803998828. The cubic root of 25512403 is about 294.3859793838.

Adding to 25512403 its reverse (30421552), we get a palindrome (55933955).

The spelling of 25512403 in words is "twenty-five million, five hundred twelve thousand, four hundred three".