25122947 has 4 divisors (see below), whose sum is σ = 25150920. Its totient is φ = 25094976.

The previous prime is 25122943. The next prime is 25122949. The reversal of 25122947 is 74922152.

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 25122947 - 2² = 25122943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25122943) 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, 12593 + ... + 14450.

It is an arithmetic number, because the mean of its divisors is an integer number (6287730).

Almost surely, 2^25122947 is an apocalyptic number.

25122947 is a deficient number, since it is larger than the sum of its proper divisors (27973).

25122947 is an equidigital number, since it uses as much as digits as its factorization.

25122947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27972.

The product of its digits is 10080, while the sum is 32.

The square root of 25122947 is about 5012.2796210906. The cubic root of 25122947 is about 292.8803224734.

The spelling of 25122947 in words is "twenty-five million, one hundred twenty-two thousand, nine hundred forty-seven".