71869257 has 12 divisors (see below), whose sum is σ = 105571440. Its totient is φ = 47100408.

The previous prime is 71869247. The next prime is 71869261. The reversal of 71869257 is 75296817.

It is not a de Polignac number, because 71869257 - 2¹⁴ = 71852873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71869247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67143 + ... + 68204.

It is an arithmetic number, because the mean of its divisors is an integer number (8797620).

Almost surely, 2^71869257 is an apocalyptic number.

It is an amenable number.

71869257 is a deficient number, since it is larger than the sum of its proper divisors (33702183).

71869257 is a wasteful number, since it uses less digits than its factorization.

71869257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135412 (or 135409 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 71869257 is about 8477.5737684788. The cubic root of 71869257 is about 415.7648005562.

The spelling of 71869257 in words is "seventy-one million, eight hundred sixty-nine thousand, two hundred fifty-seven".