25189957 has 6 divisors (see below), whose sum is σ = 27276882. Its totient is φ = 23252112.

The previous prime is 25189939. The next prime is 25189973. The reversal of 25189957 is 75998152.

It can be written as a sum of positive squares in 3 ways, for example, as 894916 + 24295041 = 946^2 + 4929^2 .

It is not a de Polignac number, because 25189957 - 2¹⁵ = 25157189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25189907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74358 + ... + 74695.

It is an arithmetic number, because the mean of its divisors is an integer number (4546147).

Almost surely, 2^25189957 is an apocalyptic number.

It is an amenable number.

25189957 is a deficient number, since it is larger than the sum of its proper divisors (2086925).

25189957 is a wasteful number, since it uses less digits than its factorization.

25189957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149079 (or 149066 counting only the distinct ones).

The product of its digits is 226800, while the sum is 46.

The square root of 25189957 is about 5018.9597527775. The cubic root of 25189957 is about 293.1404894957.

The spelling of 25189957 in words is "twenty-five million, one hundred eighty-nine thousand, nine hundred fifty-seven".