252145457 has 4 divisors (see below), whose sum is σ = 252208740. Its totient is φ = 252082176.

The previous prime is 252145423. The next prime is 252145463. The reversal of 252145457 is 754541252.

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 85451536 + 166693921 = 9244^2 + 12911^2 .

It is a cyclic number.

It is not a de Polignac number, because 252145457 - 2¹⁶ = 252079921 is a prime.

It is a super-3 number, since 3×252145457³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252145477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25232 + ... + 33777.

It is an arithmetic number, because the mean of its divisors is an integer number (63052185).

Almost surely, 2^252145457 is an apocalyptic number.

It is an amenable number.

252145457 is a deficient number, since it is larger than the sum of its proper divisors (63283).

252145457 is an equidigital number, since it uses as much as digits as its factorization.

252145457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63282.

The product of its digits is 56000, while the sum is 35.

The square root of 252145457 is about 15879.0886703236. The cubic root of 252145457 is about 631.7574653215.

The spelling of 252145457 in words is "two hundred fifty-two million, one hundred forty-five thousand, four hundred fifty-seven".