25400012 has 24 divisors (see below), whose sum is σ = 48824832. Its totient is φ = 11466000.

The previous prime is 25400009. The next prime is 25400021. The reversal of 25400012 is 21000452.

It is a self number, because there is not a number n which added to its sum of digits gives 25400012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4733 + ... + 8555.

It is an arithmetic number, because the mean of its divisors is an integer number (2034368).

Almost surely, 2^25400012 is an apocalyptic number.

25400012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25400012 is a deficient number, since it is larger than the sum of its proper divisors (23424820).

25400012 is a wasteful number, since it uses less digits than its factorization.

25400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989 (or 3987 counting only the distinct ones).

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

The square root of 25400012 is about 5039.8424578552. The cubic root of 25400012 is about 293.9530521854.

Adding to 25400012 its reverse (21000452), we get a palindrome (46400464).

The spelling of 25400012 in words is "twenty-five million, four hundred thousand, twelve".