401512140 has 60 divisors (see below), whose sum is σ = 1259563536. Its totient is φ = 107069472.

The previous prime is 401512129. The next prime is 401512141. The reversal of 401512140 is 41215104.

401512140 is a `hidden beast` number, since 401 + 51 + 214 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×401512140² = 322423997134759200, 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 (401512141) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122304 + ... + 125543.

Almost surely, 2^401512140 is an apocalyptic number.

It is an amenable number.

401512140 is an abundant number, since it is smaller than the sum of its proper divisors (858051396).

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

401512140 is a wasteful number, since it uses less digits than its factorization.

401512140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247868 (or 247857 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 401512140 is about 20037.7678397570. The cubic root of 401512140 is about 737.7335941071.

Adding to 401512140 its reverse (41215104), we get a palindrome (442727244).

The spelling of 401512140 in words is "four hundred one million, five hundred twelve thousand, one hundred forty".