25428501 has 54 divisors (see below), whose sum is σ = 45075030. Its totient is φ = 13771296.

The previous prime is 25428493. The next prime is 25428527. The reversal of 25428501 is 10582452.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23328900 + 2099601 = 4830^2 + 1449^2 .

It is not a de Polignac number, because 25428501 - 2³ = 25428493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25428581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 233235 + ... + 233343.

Almost surely, 2^25428501 is an apocalyptic number.

25428501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25428501 is a deficient number, since it is larger than the sum of its proper divisors (19646529).

25428501 is a wasteful number, since it uses less digits than its factorization.

25428501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25428501 is about 5042.6680438038. The cubic root of 25428501 is about 294.0629117069.

The spelling of 25428501 in words is "twenty-five million, four hundred twenty-eight thousand, five hundred one".