252971287 has 4 divisors (see below), whose sum is σ = 254295936. Its totient is φ = 251646640.

The previous prime is 252971281. The next prime is 252971293. The reversal of 252971287 is 782179252.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (252971281) and next prime (252971293).

It is a cyclic number.

It is not a de Polignac number, because 252971287 - 2¹⁵ = 252938519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252971281) 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, 662038 + ... + 662419.

It is an arithmetic number, because the mean of its divisors is an integer number (63573984).

Almost surely, 2^252971287 is an apocalyptic number.

252971287 is a deficient number, since it is larger than the sum of its proper divisors (1324649).

252971287 is a wasteful number, since it uses less digits than its factorization.

252971287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324648.

The product of its digits is 141120, while the sum is 43.

The square root of 252971287 is about 15905.0711095550. The cubic root of 252971287 is about 632.4464270580.

The spelling of 252971287 in words is "two hundred fifty-two million, nine hundred seventy-one thousand, two hundred eighty-seven".