25402563 has 24 divisors (see below), whose sum is σ = 38922000. Its totient is φ = 15920064.

The previous prime is 25402541. The next prime is 25402571. The reversal of 25402563 is 36520452.

It is not a de Polignac number, because 25402563 - 2⁶ = 25402499 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (25402583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24981 + ... + 25977.

It is an arithmetic number, because the mean of its divisors is an integer number (1621750).

Almost surely, 2^25402563 is an apocalyptic number.

25402563 is a deficient number, since it is larger than the sum of its proper divisors (13519437).

25402563 is a wasteful number, since it uses less digits than its factorization.

25402563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 25402563 is about 5040.0955348088. The cubic root of 25402563 is about 293.9628927206.

The spelling of 25402563 in words is "twenty-five million, four hundred two thousand, five hundred sixty-three".