25250161 has 4 divisors (see below), whose sum is σ = 25260912. Its totient is φ = 25239412.

The previous prime is 25250143. The next prime is 25250179. The reversal of 25250161 is 16105252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (25250143) and next prime (25250179).

It is a cyclic number.

It is not a de Polignac number, because 25250161 - 2⁷ = 25250033 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25250261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175 + ... + 7108.

It is an arithmetic number, because the mean of its divisors is an integer number (6315228).

Almost surely, 2^25250161 is an apocalyptic number.

It is an amenable number.

25250161 is a deficient number, since it is larger than the sum of its proper divisors (10751).

25250161 is an equidigital number, since it uses as much as digits as its factorization.

25250161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 25250161 is about 5024.9538306337. The cubic root of 25250161 is about 293.3738389599.

The spelling of 25250161 in words is "twenty-five million, two hundred fifty thousand, one hundred sixty-one".