401431442 has 4 divisors (see below), whose sum is σ = 602147166. Its totient is φ = 200715720.

The previous prime is 401431441. The next prime is 401431477. The reversal of 401431442 is 244134104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 392000401 + 9431041 = 19799^2 + 3071^2 .

It is a super-2 number, since 2×401431442² = 322294405252398728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401431441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100357859 + ... + 100357862.

Almost surely, 2^401431442 is an apocalyptic number.

401431442 is a deficient number, since it is larger than the sum of its proper divisors (200715724).

401431442 is a wasteful number, since it uses less digits than its factorization.

401431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200715723.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 401431442 is about 20035.7540911242. The cubic root of 401431442 is about 737.6841662829.

Adding to 401431442 its reverse (244134104), we get a palindrome (645565546).

The spelling of 401431442 in words is "four hundred one million, four hundred thirty-one thousand, four hundred forty-two".