25005971 has 4 divisors (see below), whose sum is σ = 25099200. Its totient is φ = 24912744.

The previous prime is 25005947. The next prime is 25005973. The reversal of 25005971 is 17950052.

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

It is a cyclic number.

It is not a de Polignac number, because 25005971 - 2⁶ = 25005907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25005973) 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, 46211 + ... + 46748.

It is an arithmetic number, because the mean of its divisors is an integer number (6274800).

Almost surely, 2^25005971 is an apocalyptic number.

25005971 is a deficient number, since it is larger than the sum of its proper divisors (93229).

25005971 is an equidigital number, since it uses as much as digits as its factorization.

25005971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93228.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 25005971 is about 5000.5970643514. The cubic root of 25005971 is about 292.4250510481.

The spelling of 25005971 in words is "twenty-five million, five thousand, nine hundred seventy-one".