401242144 has 24 divisors (see below), whose sum is σ = 817186860. Its totient is φ = 193702656.

The previous prime is 401242139. The next prime is 401242147. The reversal of 401242144 is 441242104.

It can be written as a sum of positive squares in 2 ways, for example, as 394419600 + 6822544 = 19860^2 + 2612^2 .

It is not an unprimeable number, because it can be changed into a prime (401242147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215259 + ... + 217114.

Almost surely, 2^401242144 is an apocalyptic number.

It is an amenable number.

401242144 is an abundant number, since it is smaller than the sum of its proper divisors (415944716).

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

401242144 is a wasteful number, since it uses less digits than its factorization.

401242144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432412 (or 432404 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 401242144 is about 20031.0295292079. The cubic root of 401242144 is about 737.5681945559.

Adding to 401242144 its reverse (441242104), we get a palindrome (842484248).

The spelling of 401242144 in words is "four hundred one million, two hundred forty-two thousand, one hundred forty-four".