400001042 has 8 divisors (see below), whose sum is σ = 685716096. Its totient is φ = 171429012.

The previous prime is 400001039. The next prime is 400001059. The reversal of 400001042 is 240100004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14285738 + ... + 14285765.

It is an arithmetic number, because the mean of its divisors is an integer number (85714512).

Almost surely, 2^400001042 is an apocalyptic number.

400001042 is a deficient number, since it is larger than the sum of its proper divisors (285715054).

400001042 is a wasteful number, since it uses less digits than its factorization.

400001042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28571512.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 400001042 is about 20000.0260499830. The cubic root of 400001042 is about 736.8069395210.

Adding to 400001042 its reverse (240100004), we get a palindrome (640101046).

The spelling of 400001042 in words is "four hundred million, one thousand, forty-two".