252406685 has 8 divisors (see below), whose sum is σ = 309332736. Its totient is φ = 197628880.

The previous prime is 252406673. The next prime is 252406717. The reversal of 252406685 is 586604252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-252406685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536801 + ... + 537270.

It is an arithmetic number, because the mean of its divisors is an integer number (38666592).

Almost surely, 2^252406685 is an apocalyptic number.

It is an amenable number.

252406685 is a deficient number, since it is larger than the sum of its proper divisors (56926051).

252406685 is a wasteful number, since it uses less digits than its factorization.

252406685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074123.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 252406685 is about 15887.3120759932. The cubic root of 252406685 is about 631.9755613647.

The spelling of 252406685 in words is "two hundred fifty-two million, four hundred six thousand, six hundred eighty-five".