25247247 has 8 divisors (see below), whose sum is σ = 33686400. Its totient is φ = 16819800.

The previous prime is 25247231. The next prime is 25247249. The reversal of 25247247 is 74274252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25247247 - 2⁴ = 25247231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25247249) 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, 6004 + ... + 9302.

It is an arithmetic number, because the mean of its divisors is an integer number (4210800).

Almost surely, 2^25247247 is an apocalyptic number.

25247247 is a deficient number, since it is larger than the sum of its proper divisors (8439153).

25247247 is a wasteful number, since it uses less digits than its factorization.

25247247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853.

The product of its digits is 31360, while the sum is 33.

The square root of 25247247 is about 5024.6638693548. The cubic root of 25247247 is about 293.3625529031.

The spelling of 25247247 in words is "twenty-five million, two hundred forty-seven thousand, two hundred forty-seven".