402413621 has 8 divisors (see below), whose sum is σ = 406176000. Its totient is φ = 398669040.

The previous prime is 402413603. The next prime is 402413623. The reversal of 402413621 is 126314204.

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 402413621 - 2²² = 398219317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402413623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43331 + ... + 51791.

It is an arithmetic number, because the mean of its divisors is an integer number (50772000).

Almost surely, 2^402413621 is an apocalyptic number.

It is an amenable number.

402413621 is a deficient number, since it is larger than the sum of its proper divisors (3762379).

402413621 is a wasteful number, since it uses less digits than its factorization.

402413621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8899.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 402413621 is about 20060.2497741180. The cubic root of 402413621 is about 738.2853048717.

Adding to 402413621 its reverse (126314204), we get a palindrome (528727825).

The spelling of 402413621 in words is "four hundred two million, four hundred thirteen thousand, six hundred twenty-one".