401621943 has 8 divisors (see below), whose sum is σ = 563680000. Its totient is φ = 253655928.

The previous prime is 401621933. The next prime is 401621953. The reversal of 401621943 is 349126104.

It is an interprime number because it is at equal distance from previous prime (401621933) and next prime (401621953).

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

It is not a de Polignac number, because 401621943 - 2⁸ = 401621687 is a prime.

It is a super-2 number, since 2×401621943² = 322600370198190498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401621943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401621903) 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, 3522943 + ... + 3523056.

It is an arithmetic number, because the mean of its divisors is an integer number (70460000).

Almost surely, 2^401621943 is an apocalyptic number.

401621943 is a deficient number, since it is larger than the sum of its proper divisors (162058057).

401621943 is a wasteful number, since it uses less digits than its factorization.

401621943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7046021.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 401621943 is about 20040.5075534528. The cubic root of 401621943 is about 737.8008382164.

The spelling of 401621943 in words is "four hundred one million, six hundred twenty-one thousand, nine hundred forty-three".