401125242 has 32 divisors (see below), whose sum is σ = 938184192. Its totient is φ = 111941424.

The previous prime is 401125223. The next prime is 401125259. The reversal of 401125242 is 242521104.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 109248 + ... + 112859.

It is an arithmetic number, because the mean of its divisors is an integer number (29318256).

Almost surely, 2^401125242 is an apocalyptic number.

401125242 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

401125242 is an abundant number, since it is smaller than the sum of its proper divisors (537058950).

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

401125242 is a wasteful number, since it uses less digits than its factorization.

401125242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222162.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 401125242 is about 20028.1112938789. Note that the first 3 decimals coincide. The cubic root of 401125242 is about 737.4965573717.

Adding to 401125242 its reverse (242521104), we get a palindrome (643646346).

It can be divided in two parts, 40112 and 5242, that added together give a palindrome (45354).

The spelling of 401125242 in words is "four hundred one million, one hundred twenty-five thousand, two hundred forty-two".