402042442001 has 4 divisors (see below), whose sum is σ = 406559772900. Its totient is φ = 397525111104.

The previous prime is 402042441929. The next prime is 402042442033. The reversal of 402042442001 is 100244240204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44605862401 + 357436579600 = 211201^2 + 597860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402042442001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402042442601) 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, 2258665316 + ... + 2258665493.

It is an arithmetic number, because the mean of its divisors is an integer number (101639943225).

Almost surely, 2^402042442001 is an apocalyptic number.

It is an amenable number.

402042442001 is a deficient number, since it is larger than the sum of its proper divisors (4517330899).

402042442001 is an equidigital number, since it uses as much as digits as its factorization.

402042442001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517330898.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 402042442001 its reverse (100244240204), we get a palindrome (502286682205).

The spelling of 402042442001 in words is "four hundred two billion, forty-two million, four hundred forty-two thousand, one".