402021140245 has 8 divisors (see below), whose sum is σ = 482462633016. Its totient is φ = 321592069056.

The previous prime is 402021140197. The next prime is 402021140263. The reversal of 402021140245 is 542041120204.

It can be written as a sum of positive squares in 4 ways, for example, as 54065085361 + 347956054884 = 232519^2 + 589878^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 402021140245 - 2²⁷ = 401886922517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3034042 + ... + 3163771.

It is an arithmetic number, because the mean of its divisors is an integer number (60307829127).

Almost surely, 2^402021140245 is an apocalyptic number.

It is an amenable number.

402021140245 is a deficient number, since it is larger than the sum of its proper divisors (80441492771).

402021140245 is a wasteful number, since it uses less digits than its factorization.

402021140245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6210791.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 402021140245 its reverse (542041120204), we get a palindrome (944062260449).

The spelling of 402021140245 in words is "four hundred two billion, twenty-one million, one hundred forty thousand, two hundred forty-five".