401421643 has 8 divisors (see below), whose sum is σ = 459652320. Its totient is φ = 343412160.

The previous prime is 401421623. The next prime is 401421653. The reversal of 401421643 is 346124104.

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

It is not a de Polignac number, because 401421643 - 2⁹ = 401421131 is a prime.

It is a super-2 number, since 2×401421643² = 322278670937638898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401421613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51388 + ... + 58681.

It is an arithmetic number, because the mean of its divisors is an integer number (57456540).

Almost surely, 2^401421643 is an apocalyptic number.

401421643 is a deficient number, since it is larger than the sum of its proper divisors (58230677).

401421643 is a wasteful number, since it uses less digits than its factorization.

401421643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110597.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 401421643 is about 20035.5095517933. The cubic root of 401421643 is about 737.6781639080.

Adding to 401421643 its reverse (346124104), we get a palindrome (747545747).

The spelling of 401421643 in words is "four hundred one million, four hundred twenty-one thousand, six hundred forty-three".