401215042 has 4 divisors (see below), whose sum is σ = 601822566. Its totient is φ = 200607520.

The previous prime is 401215027. The next prime is 401215057. The reversal of 401215042 is 240512104.

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

It is an interprime number because it is at equal distance from previous prime (401215027) and next prime (401215057).

It can be written as a sum of positive squares in only one way, i.e., 330839721 + 70375321 = 18189^2 + 8389^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100303759 + ... + 100303762.

Almost surely, 2^401215042 is an apocalyptic number.

401215042 is a deficient number, since it is larger than the sum of its proper divisors (200607524).

401215042 is a wasteful number, since it uses less digits than its factorization.

401215042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200607523.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 401215042 is about 20030.3530173584. The cubic root of 401215042 is about 737.5515877732.

Adding to 401215042 its reverse (240512104), we get a palindrome (641727146).

The spelling of 401215042 in words is "four hundred one million, two hundred fifteen thousand, forty-two".