25670247 has 4 divisors (see below), whose sum is σ = 34227000. Its totient is φ = 17113496.

The previous prime is 25670243. The next prime is 25670287. The reversal of 25670247 is 74207652.

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 25670247 - 2² = 25670243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25670243) 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, 4278372 + ... + 4278377.

It is an arithmetic number, because the mean of its divisors is an integer number (8556750).

Almost surely, 2^25670247 is an apocalyptic number.

25670247 is a deficient number, since it is larger than the sum of its proper divisors (8556753).

25670247 is an equidigital number, since it uses as much as digits as its factorization.

25670247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556752.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 25670247 is about 5066.5813918262. The cubic root of 25670247 is about 294.9918488603.

Adding to 25670247 its reverse (74207652), we get a palindrome (99877899).

The spelling of 25670247 in words is "twenty-five million, six hundred seventy thousand, two hundred forty-seven".