400142241 has 16 divisors (see below), whose sum is σ = 594721920. Its totient is φ = 265898160.

The previous prime is 400142233. The next prime is 400142257. The reversal of 400142241 is 142241004.

It is not a de Polignac number, because 400142241 - 2³ = 400142233 is a prime.

It is a super-2 number, since 2×400142241² = 320227626065004162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400142221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15430 + ... + 32223.

It is an arithmetic number, because the mean of its divisors is an integer number (37170120).

Almost surely, 2^400142241 is an apocalyptic number.

It is an amenable number.

400142241 is a deficient number, since it is larger than the sum of its proper divisors (194579679).

400142241 is a wasteful number, since it uses less digits than its factorization.

400142241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47973 (or 47967 counting only the distinct ones).

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

The square root of 400142241 is about 20003.5557089234. Note that the first 3 decimals coincide. The cubic root of 400142241 is about 736.8936260985.

Adding to 400142241 its reverse (142241004), we get a palindrome (542383245).

The spelling of 400142241 in words is "four hundred million, one hundred forty-two thousand, two hundred forty-one".