252168421 has 8 divisors (see below), whose sum is σ = 254145600. Its totient is φ = 250199040.

The previous prime is 252168403. The next prime is 252168439. The reversal of 252168421 is 124861252.

It is an interprime number because it is at equal distance from previous prime (252168403) and next prime (252168439).

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

It is a cyclic number.

It is not a de Polignac number, because 252168421 - 2¹¹ = 252166373 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 (252168451) 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, 74085 + ... + 77413.

It is an arithmetic number, because the mean of its divisors is an integer number (31768200).

Almost surely, 2^252168421 is an apocalyptic number.

It is an amenable number.

252168421 is a deficient number, since it is larger than the sum of its proper divisors (1977179).

252168421 is a wasteful number, since it uses less digits than its factorization.

252168421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899.

The product of its digits is 7680, while the sum is 31.

The square root of 252168421 is about 15879.8117432166. The cubic root of 252168421 is about 631.7766437198.

The spelling of 252168421 in words is "two hundred fifty-two million, one hundred sixty-eight thousand, four hundred twenty-one".