402102123 has 16 divisors (see below), whose sum is σ = 559933440. Its totient is φ = 256189824.

The previous prime is 402102121. The next prime is 402102133. The reversal of 402102123 is 321201204.

It is not a de Polignac number, because 402102123 - 2¹ = 402102121 is a prime.

It is a super-3 number, since 3×402102123³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (402102121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119715 + ... + 123027.

It is an arithmetic number, because the mean of its divisors is an integer number (34995840).

Almost surely, 2^402102123 is an apocalyptic number.

402102123 is a deficient number, since it is larger than the sum of its proper divisors (157831317).

402102123 is a wasteful number, since it uses less digits than its factorization.

402102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 402102123 is about 20052.4842101920. The cubic root of 402102123 is about 738.0947598301.

Adding to 402102123 its reverse (321201204), we get a palindrome (723303327).

The spelling of 402102123 in words is "four hundred two million, one hundred two thousand, one hundred twenty-three".