25402025 has 24 divisors (see below), whose sum is σ = 34872768. Its totient is φ = 18200000.

The previous prime is 25402021. The next prime is 25402033. The reversal of 25402025 is 52020452.

It is not a de Polignac number, because 25402025 - 2² = 25402021 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25401988 and 25402006.

It is not an unprimeable number, because it can be changed into a prime (25402021) 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, 18875 + ... + 20175.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^25402025 is an apocalyptic number.

25402025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25402025 is a deficient number, since it is larger than the sum of its proper divisors (9470743).

25402025 is a wasteful number, since it uses less digits than its factorization.

25402025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 25402025 is about 5040.0421625221. The cubic root of 25402025 is about 293.9608174293.

Adding to 25402025 its reverse (52020452), we get a palindrome (77422477).

The spelling of 25402025 in words is "twenty-five million, four hundred two thousand, twenty-five".