25221267 has 8 divisors (see below), whose sum is σ = 37364880. Its totient is φ = 16814160.

The previous prime is 25221253. The next prime is 25221277. The reversal of 25221267 is 76212252.

It is a de Polignac number, because none of the positive numbers 2^k-25221267 is a prime.

It is a super-2 number, since 2×25221267² = 1272224618170578, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 934121 = 25221267 / (2 + 5 + 2 + 2 + 1 + 2 + 6 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 25221267.

It is not an unprimeable number, because it can be changed into a prime (25221277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467034 + ... + 467087.

It is an arithmetic number, because the mean of its divisors is an integer number (4670610).

Almost surely, 2^25221267 is an apocalyptic number.

25221267 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

25221267 is a deficient number, since it is larger than the sum of its proper divisors (12143613).

25221267 is an equidigital number, since it uses as much as digits as its factorization.

25221267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934130 (or 934124 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 25221267 is about 5022.0779563842. The cubic root of 25221267 is about 293.2618927549.

The spelling of 25221267 in words is "twenty-five million, two hundred twenty-one thousand, two hundred sixty-seven".