402005122 has 8 divisors (see below), whose sum is σ = 603231372. Its totient is φ = 200928000.

The previous prime is 402005119. The next prime is 402005161. The reversal of 402005122 is 221500204.

It can be written as a sum of positive squares in 2 ways, for example, as 400440121 + 1565001 = 20011^2 + 1251^2 .

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

It is a super-2 number, since 2×402005122² = 323216236228469768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402005096 and 402005105.

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, 30279 + ... + 41482.

Almost surely, 2^402005122 is an apocalyptic number.

402005122 is a deficient number, since it is larger than the sum of its proper divisors (201226250).

402005122 is a wasteful number, since it uses less digits than its factorization.

402005122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74564.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 402005122 is about 20050.0653864270. The cubic root of 402005122 is about 738.0354036918.

Adding to 402005122 its reverse (221500204), we get a palindrome (623505326).

The spelling of 402005122 in words is "four hundred two million, five thousand, one hundred twenty-two".