402252645 has 8 divisors (see below), whose sum is σ = 643604256. Its totient is φ = 214534736.

The previous prime is 402252637. The next prime is 402252671. The reversal of 402252645 is 546252204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402252645 - 2³ = 402252637 is a prime.

It is a Curzon number.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 13408407 + ... + 13408436.

It is an arithmetic number, because the mean of its divisors is an integer number (80450532).

Almost surely, 2^402252645 is an apocalyptic number.

It is an amenable number.

402252645 is a deficient number, since it is larger than the sum of its proper divisors (241351611).

402252645 is a wasteful number, since it uses less digits than its factorization.

402252645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26816851.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 402252645 is about 20056.2370598275. The cubic root of 402252645 is about 738.1868472486.

The spelling of 402252645 in words is "four hundred two million, two hundred fifty-two thousand, six hundred forty-five".