401440142 has 32 divisors (see below), whose sum is σ = 663552000. Its totient is φ = 181319040.

The previous prime is 401440103. The next prime is 401440147. The reversal of 401440142 is 241044104.

It is a happy number.

It is a super-2 number, since 2×401440142² = 322308375217960328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401440147) 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, 132359 + ... + 135357.

It is an arithmetic number, because the mean of its divisors is an integer number (20736000).

Almost surely, 2^401440142 is an apocalyptic number.

401440142 is a deficient number, since it is larger than the sum of its proper divisors (262111858).

401440142 is a wasteful number, since it uses less digits than its factorization.

401440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 401440142 is about 20035.9712018160. The cubic root of 401440142 is about 737.6894953837.

Adding to 401440142 its reverse (241044104), we get a palindrome (642484246).

The spelling of 401440142 in words is "four hundred one million, four hundred forty thousand, one hundred forty-two".