402505252 has 6 divisors (see below), whose sum is σ = 704384198. Its totient is φ = 201252624.

The previous prime is 402505231. The next prime is 402505261. The reversal of 402505252 is 252505204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 256192036 + 146313216 = 16006^2 + 12096^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50313153 + ... + 50313160.

Almost surely, 2^402505252 is an apocalyptic number.

It is an amenable number.

402505252 is a deficient number, since it is larger than the sum of its proper divisors (301878946).

402505252 is a wasteful number, since it uses less digits than its factorization.

402505252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100626317 (or 100626315 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 402505252 is about 20062.5335389128. The cubic root of 402505252 is about 738.3413373411.

The spelling of 402505252 in words is "four hundred two million, five hundred five thousand, two hundred fifty-two".