402140123205 has 32 divisors (see below), whose sum is σ = 681435151488. Its totient is φ = 201810432000.

The previous prime is 402140123173. The next prime is 402140123207. The reversal of 402140123205 is 502321041204.

It is not a de Polignac number, because 402140123205 - 2⁵ = 402140123173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402140123207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895530 + ... + 1267380.

It is an arithmetic number, because the mean of its divisors is an integer number (21294848484).

Almost surely, 2^402140123205 is an apocalyptic number.

It is an amenable number.

402140123205 is a deficient number, since it is larger than the sum of its proper divisors (279295028283).

402140123205 is a wasteful number, since it uses less digits than its factorization.

402140123205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376117.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 402140123205 its reverse (502321041204), we get a palindrome (904461164409).

The spelling of 402140123205 in words is "four hundred two billion, one hundred forty million, one hundred twenty-three thousand, two hundred five".