401121504240 has 80 divisors (see below), whose sum is σ = 1244317385376. Its totient is φ = 106893414400.

The previous prime is 401121504229. The next prime is 401121504263. The reversal of 401121504240 is 42405121104.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×401121504240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 401121504240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208821 + ... + 919700.

Almost surely, 2^401121504240 is an apocalyptic number.

401121504240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401121504240 is an abundant number, since it is smaller than the sum of its proper divisors (843195881136).

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

401121504240 is a wasteful number, since it uses less digits than its factorization.

401121504240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130018 (or 1130012 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 401121504240 its reverse (42405121104), we get a palindrome (443526625344).

The spelling of 401121504240 in words is "four hundred one billion, one hundred twenty-one million, five hundred four thousand, two hundred forty".