25420104 has 24 divisors (see below), whose sum is σ = 68846310. Its totient is φ = 8473344.

The previous prime is 25420099. The next prime is 25420139. The reversal of 25420104 is 40102452.

It can be written as a sum of positive squares in only one way, i.e., 22071204 + 3348900 = 4698^2 + 1830^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176457 + ... + 176600.

Almost surely, 2^25420104 is an apocalyptic number.

25420104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25420104 is an abundant number, since it is smaller than the sum of its proper divisors (43426206).

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

25420104 is a wasteful number, since it uses less digits than its factorization.

25420104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353069 (or 353062 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25420104 is about 5041.8353800972. The cubic root of 25420104 is about 294.0305396569.

Adding to 25420104 its reverse (40102452), we get a palindrome (65522556).

The spelling of 25420104 in words is "twenty-five million, four hundred twenty thousand, one hundred four".