25424425 has 12 divisors (see below), whose sum is σ = 33951820. Its totient is φ = 18774720.

The previous prime is 25424419. The next prime is 25424429. The reversal of 25424425 is 52442452.

It can be written as a sum of positive squares in 6 ways, for example, as 1089936 + 24334489 = 1044^2 + 4933^2 .

It is not a de Polignac number, because 25424425 - 2¹³ = 25416233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25424393 and 25424402.

It is not an unprimeable number, because it can be changed into a prime (25424429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38790 + ... + 39439.

Almost surely, 2^25424425 is an apocalyptic number.

25424425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25424425 is a deficient number, since it is larger than the sum of its proper divisors (8527395).

25424425 is a wasteful number, since it uses less digits than its factorization.

25424425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78252 (or 78247 counting only the distinct ones).

The product of its digits is 12800, while the sum is 28.

The square root of 25424425 is about 5042.2638764745. The cubic root of 25424425 is about 294.0471988332.

Adding to 25424425 its reverse (52442452), we get a palindrome (77866877).

The spelling of 25424425 in words is "twenty-five million, four hundred twenty-four thousand, four hundred twenty-five".