25420040 has 32 divisors (see below), whose sum is σ = 57456000. Its totient is φ = 10121664.

The previous prime is 25420039. The next prime is 25420063. The reversal of 25420040 is 4002452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8231 + ... + 10889.

It is an arithmetic number, because the mean of its divisors is an integer number (1795500).

Almost surely, 2^25420040 is an apocalyptic number.

25420040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25420040 is an abundant number, since it is smaller than the sum of its proper divisors (32035960).

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

25420040 is a wasteful number, since it uses less digits than its factorization.

25420040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2909 (or 2905 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 25420040 is about 5041.8290331982. The cubic root of 25420040 is about 294.0302928972.

Adding to 25420040 its reverse (4002452), we get a palindrome (29422492).

The spelling of 25420040 in words is "twenty-five million, four hundred twenty thousand, forty".