401421042 has 64 divisors (see below), whose sum is σ = 975582720. Its totient is φ = 121338000.

The previous prime is 401421023. The next prime is 401421043. The reversal of 401421042 is 240124104.

It is a super-2 number, since 2×401421042² = 322277705920731528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (401421043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381417 + ... + 382467.

It is an arithmetic number, because the mean of its divisors is an integer number (15243480).

Almost surely, 2^401421042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401421042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487791360).

401421042 is an abundant number, since it is smaller than the sum of its proper divisors (574161678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401421042 is a wasteful number, since it uses less digits than its factorization.

401421042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716 (or 1710 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 401421042 is about 20035.4945534169. The cubic root of 401421042 is about 737.6777957625.

Adding to 401421042 its reverse (240124104), we get a palindrome (641545146).

The spelling of 401421042 in words is "four hundred one million, four hundred twenty-one thousand, forty-two".