252405529 has 4 divisors (see below), whose sum is σ = 252450484. Its totient is φ = 252360576.

The previous prime is 252405509. The next prime is 252405533. The reversal of 252405529 is 925504252.

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 118309129 + 134096400 = 10877^2 + 11580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252405529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252405494 and 252405503.

It is not an unprimeable number, because it can be changed into a prime (252405509) 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, 12612 + ... + 25765.

It is an arithmetic number, because the mean of its divisors is an integer number (63112621).

Almost surely, 2^252405529 is an apocalyptic number.

It is an amenable number.

252405529 is a deficient number, since it is larger than the sum of its proper divisors (44955).

252405529 is an equidigital number, since it uses as much as digits as its factorization.

252405529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44954.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 252405529 is about 15887.2756947187. The cubic root of 252405529 is about 631.9745965661.

The spelling of 252405529 in words is "two hundred fifty-two million, four hundred five thousand, five hundred twenty-nine".