25200861 has 16 divisors (see below), whose sum is σ = 39641088. Its totient is φ = 13935600.

The previous prime is 25200853. The next prime is 25200871. The reversal of 25200861 is 16800252.

It is not a de Polignac number, because 25200861 - 2³ = 25200853 is a prime.

25200861 is a modest number, since divided by 861 gives 252 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25200871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18705 + ... + 20006.

It is an arithmetic number, because the mean of its divisors is an integer number (2477568).

Almost surely, 2^25200861 is an apocalyptic number.

25200861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25200861 is a deficient number, since it is larger than the sum of its proper divisors (14440227).

25200861 is a wasteful number, since it uses less digits than its factorization.

25200861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38752.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 25200861 is about 5020.0459161247. The cubic root of 25200861 is about 293.1827807257.

The spelling of 25200861 in words is "twenty-five million, two hundred thousand, eight hundred sixty-one".