252725866 has 4 divisors (see below), whose sum is σ = 379088802. Its totient is φ = 126362932.

The previous prime is 252725861. The next prime is 252725881. The reversal of 252725866 is 668527252.

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

It can be written as a sum of positive squares in only one way, i.e., 251888641 + 837225 = 15871^2 + 915^2 .

It is not an unprimeable number, because it can be changed into a prime (252725861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63181465 + ... + 63181468.

Almost surely, 2^252725866 is an apocalyptic number.

252725866 is a deficient number, since it is larger than the sum of its proper divisors (126362936).

252725866 is a wasteful number, since it uses less digits than its factorization.

252725866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126362935.

The product of its digits is 403200, while the sum is 43.

The square root of 252725866 is about 15897.3540565718. The cubic root of 252725866 is about 632.2418374940.

The spelling of 252725866 in words is "two hundred fifty-two million, seven hundred twenty-five thousand, eight hundred sixty-six".