252540129 has 4 divisors (see below), whose sum is σ = 336720176. Its totient is φ = 168360084.

The previous prime is 252540121. The next prime is 252540131. The reversal of 252540129 is 921045252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 252540129 - 2³ = 252540121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252540096 and 252540105.

It is not an unprimeable number, because it can be changed into a prime (252540121) 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, 42090019 + ... + 42090024.

It is an arithmetic number, because the mean of its divisors is an integer number (84180044).

Almost surely, 2^252540129 is an apocalyptic number.

It is an amenable number.

252540129 is a deficient number, since it is larger than the sum of its proper divisors (84180047).

252540129 is an equidigital number, since it uses as much as digits as its factorization.

252540129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84180046.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 252540129 is about 15891.5112245500. The cubic root of 252540129 is about 632.0869140536.

The spelling of 252540129 in words is "two hundred fifty-two million, five hundred forty thousand, one hundred twenty-nine".