401542842 has 8 divisors (see below), whose sum is σ = 803085696. Its totient is φ = 133847612.

The previous prime is 401542837. The next prime is 401542847. The reversal of 401542842 is 248245104.

It is an interprime number because it is at equal distance from previous prime (401542837) and next prime (401542847).

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

401542842 is an admirable number.

It is a super-2 number, since 2×401542842² = 322473307922873928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401542847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33461898 + ... + 33461909.

It is an arithmetic number, because the mean of its divisors is an integer number (100385712).

Almost surely, 2^401542842 is an apocalyptic number.

401542842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

401542842 is a wasteful number, since it uses less digits than its factorization.

401542842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66923812.

The product of its (nonzero) digits is 10240, while the sum is 30.

The square root of 401542842 is about 20038.5339284090. The cubic root of 401542842 is about 737.7523974568.

Adding to 401542842 its reverse (248245104), we get a palindrome (649787946).

The spelling of 401542842 in words is "four hundred one million, five hundred forty-two thousand, eight hundred forty-two".