400602621 has 8 divisors (see below), whose sum is σ = 535547680. Its totient is φ = 266362992.

The previous prime is 400602599. The next prime is 400602679. The reversal of 400602621 is 126206004.

It is a happy number.

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

It is not a de Polignac number, because 400602621 - 2¹¹ = 400600573 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 (400602691) by changing a digit.

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, 175030 + ... + 177303.

It is an arithmetic number, because the mean of its divisors is an integer number (66943460).

Almost surely, 2^400602621 is an apocalyptic number.

It is an amenable number.

400602621 is a deficient number, since it is larger than the sum of its proper divisors (134945059).

400602621 is a wasteful number, since it uses less digits than its factorization.

400602621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352715.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 400602621 is about 20015.0598550192. The cubic root of 400602621 is about 737.1761265267.

Adding to 400602621 its reverse (126206004), we get a palindrome (526808625).

The spelling of 400602621 in words is "four hundred million, six hundred two thousand, six hundred twenty-one".