25006161 has 4 divisors (see below), whose sum is σ = 33341552. Its totient is φ = 16670772.

The previous prime is 25006159. The next prime is 25006169. The reversal of 25006161 is 16160052.

It is a happy number.

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.

It is not a de Polignac number, because 25006161 - 2¹ = 25006159 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25006169) 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, 4167691 + ... + 4167696.

It is an arithmetic number, because the mean of its divisors is an integer number (8335388).

Almost surely, 2^25006161 is an apocalyptic number.

It is an amenable number.

25006161 is a deficient number, since it is larger than the sum of its proper divisors (8335391).

25006161 is an equidigital number, since it uses as much as digits as its factorization.

25006161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8335390.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 25006161 is about 5000.6160620468. The cubic root of 25006161 is about 292.4257916795.

The spelling of 25006161 in words is "twenty-five million, six thousand, one hundred sixty-one".