401240042 has 8 divisors (see below), whose sum is σ = 687840096. Its totient is φ = 171960012.

The previous prime is 401240029. The next prime is 401240053. The reversal of 401240042 is 240042104.

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

It is a self number, because there is not a number n which added to its sum of digits gives 401240042.

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, 14329988 + ... + 14330015.

It is an arithmetic number, because the mean of its divisors is an integer number (85980012).

Almost surely, 2^401240042 is an apocalyptic number.

401240042 is a deficient number, since it is larger than the sum of its proper divisors (286600054).

401240042 is a wasteful number, since it uses less digits than its factorization.

401240042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28660012.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 401240042 is about 20030.9770605430. The cubic root of 401240042 is about 737.5669065796.

Adding to 401240042 its reverse (240042104), we get a palindrome (641282146).

The spelling of 401240042 in words is "four hundred one million, two hundred forty thousand, forty-two".