252146905 has 4 divisors (see below), whose sum is σ = 302576292. Its totient is φ = 201717520.

The previous prime is 252146857. The next prime is 252146911. The reversal of 252146905 is 509641252.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 108722329 + 143424576 = 10427^2 + 11976^2 .

It is a de Polignac number, because none of the positive numbers 2^k-252146905 is a prime.

It is a super-3 number, since 3×252146905³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25214686 + ... + 25214695.

It is an arithmetic number, because the mean of its divisors is an integer number (75644073).

Almost surely, 2^252146905 is an apocalyptic number.

It is an amenable number.

252146905 is a deficient number, since it is larger than the sum of its proper divisors (50429387).

252146905 is an equidigital number, since it uses as much as digits as its factorization.

252146905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50429386.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 252146905 is about 15879.1342648143. The cubic root of 252146905 is about 631.7586746540.

The spelling of 252146905 in words is "two hundred fifty-two million, one hundred forty-six thousand, nine hundred five".