25161562 has 4 divisors (see below), whose sum is σ = 37742346. Its totient is φ = 12580780.

The previous prime is 25161551. The next prime is 25161571. The reversal of 25161562 is 26516152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24890121 + 271441 = 4989^2 + 521^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25161562.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6290389 + ... + 6290392.

Almost surely, 2^25161562 is an apocalyptic number.

25161562 is a deficient number, since it is larger than the sum of its proper divisors (12580784).

25161562 is a wasteful number, since it uses less digits than its factorization.

25161562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12580783.

The product of its digits is 3600, while the sum is 28.

The square root of 25161562 is about 5016.1301817238. The cubic root of 25161562 is about 293.0303020142.

The spelling of 25161562 in words is "twenty-five million, one hundred sixty-one thousand, five hundred sixty-two".