252766421 has 8 divisors (see below), whose sum is σ = 270138240. Its totient is φ = 235672768.

The previous prime is 252766403. The next prime is 252766433. The reversal of 252766421 is 124667252.

252766421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-252766421 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 (252766441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67661 + ... + 71298.

It is an arithmetic number, because the mean of its divisors is an integer number (33767280).

Almost surely, 2^252766421 is an apocalyptic number.

It is an amenable number.

252766421 is a deficient number, since it is larger than the sum of its proper divisors (17371819).

252766421 is a wasteful number, since it uses less digits than its factorization.

252766421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139083.

The product of its digits is 40320, while the sum is 35.

The square root of 252766421 is about 15898.6295321326. The cubic root of 252766421 is about 632.2756543680.

The spelling of 252766421 in words is "two hundred fifty-two million, seven hundred sixty-six thousand, four hundred twenty-one".