25520870 has 16 divisors (see below), whose sum is σ = 47522160. Its totient is φ = 9856224.

The previous prime is 25520867. The next prime is 25520881. The reversal of 25520870 is 7802552.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 43712 + ... + 44291.

It is an arithmetic number, because the mean of its divisors is an integer number (2970135).

Almost surely, 2^25520870 is an apocalyptic number.

25520870 is a deficient number, since it is larger than the sum of its proper divisors (22001290).

25520870 is a wasteful number, since it uses less digits than its factorization.

25520870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88039.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 25520870 is about 5051.8184844668. The cubic root of 25520870 is about 294.4185425048.

The spelling of 25520870 in words is "twenty-five million, five hundred twenty thousand, eight hundred seventy".