25009940 has 12 divisors (see below), whose sum is σ = 52520916. Its totient is φ = 10003968.

The previous prime is 25009931. The next prime is 25009967. The reversal of 25009940 is 4990052.

It can be written as a sum of positive squares in 2 ways, for example, as 18679684 + 6330256 = 4322^2 + 2516^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625229 + ... + 625268.

It is an arithmetic number, because the mean of its divisors is an integer number (4376743).

Almost surely, 2^25009940 is an apocalyptic number.

25009940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25009940 is an abundant number, since it is smaller than the sum of its proper divisors (27510976).

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

25009940 is a wasteful number, since it uses less digits than its factorization.

25009940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250506 (or 1250504 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 25009940 is about 5000.9939012160. The cubic root of 25009940 is about 292.4405216681.

Adding to 25009940 its reverse (4990052), we get a palindrome (29999992).

The spelling of 25009940 in words is "twenty-five million, nine thousand, nine hundred forty".