25491064 has 16 divisors (see below), whose sum is σ = 47913120. Its totient is φ = 12714240.

The previous prime is 25491019. The next prime is 25491079. The reversal of 25491064 is 46019452.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (2994570).

Almost surely, 2^25491064 is an apocalyptic number.

It is an amenable number.

25491064 is a deficient number, since it is larger than the sum of its proper divisors (22422056).

25491064 is a wasteful number, since it uses less digits than its factorization.

25491064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830 (or 7826 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 25491064 is about 5048.8675958080. The cubic root of 25491064 is about 294.3038800397.

The spelling of 25491064 in words is "twenty-five million, four hundred ninety-one thousand, sixty-four".