253642671 has 24 divisors (see below), whose sum is σ = 393054480. Its totient is φ = 163259712.

The previous prime is 253642657. The next prime is 253642679. The reversal of 253642671 is 176246352.

253642671 is a `hidden beast` number, since 2 + 5 + 3 + 642 + 6 + 7 + 1 = 666.

It is not a de Polignac number, because 253642671 - 2⁵ = 253642639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253642679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10950 + ... + 25043.

It is an arithmetic number, because the mean of its divisors is an integer number (16377270).

Almost surely, 2^253642671 is an apocalyptic number.

253642671 is a deficient number, since it is larger than the sum of its proper divisors (139411809).

253642671 is an equidigital number, since it uses as much as digits as its factorization.

253642671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36037 (or 36025 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 253642671 is about 15926.1630972435. The cubic root of 253642671 is about 633.0054355904.

The spelling of 253642671 in words is "two hundred fifty-three million, six hundred forty-two thousand, six hundred seventy-one".