252170421 has 8 divisors (see below), whose sum is σ = 336315360. Its totient is φ = 168069552.

The previous prime is 252170419. The next prime is 252170473. The reversal of 252170421 is 124071252.

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

It is not a de Polignac number, because 252170421 - 2¹ = 252170419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 252170391 and 252170400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252170411) 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, 6166 + ... + 23288.

It is an arithmetic number, because the mean of its divisors is an integer number (42039420).

Almost surely, 2^252170421 is an apocalyptic number.

It is an amenable number.

252170421 is a deficient number, since it is larger than the sum of its proper divisors (84144939).

252170421 is a wasteful number, since it uses less digits than its factorization.

252170421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22035.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 252170421 is about 15879.8747161305. The cubic root of 252170421 is about 631.7783139659.

The spelling of 252170421 in words is "two hundred fifty-two million, one hundred seventy thousand, four hundred twenty-one".