25100420 has 12 divisors (see below), whose sum is σ = 52710924. Its totient is φ = 10040160.

The previous prime is 25100401. The next prime is 25100423. The reversal of 25100420 is 2400152.

It can be written as a sum of positive squares in 2 ways, for example, as 14394436 + 10705984 = 3794^2 + 3272^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25100395 and 25100404.

It is not an unprimeable number, because it can be changed into a prime (25100423) 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, 627491 + ... + 627530.

It is an arithmetic number, because the mean of its divisors is an integer number (4392577).

Almost surely, 2^25100420 is an apocalyptic number.

25100420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25100420 is an abundant number, since it is smaller than the sum of its proper divisors (27610504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25100420 is a wasteful number, since it uses less digits than its factorization.

25100420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255030 (or 1255028 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 25100420 is about 5010.0319360260. The cubic root of 25100420 is about 292.7927572686.

Adding to 25100420 its reverse (2400152), we get a palindrome (27500572).

The spelling of 25100420 in words is "twenty-five million, one hundred thousand, four hundred twenty".