402140123 has 16 divisors (see below), whose sum is σ = 504748800. Its totient is φ = 311244000.

The previous prime is 402140113. The next prime is 402140143. The reversal of 402140123 is 321041204.

It is a cyclic number.

It is not a de Polignac number, because 402140123 - 2⁴ = 402140107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402140113) 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 15 ways as a sum of consecutive naturals, for example, 6053 + ... + 28998.

It is an arithmetic number, because the mean of its divisors is an integer number (31546800).

Almost surely, 2^402140123 is an apocalyptic number.

402140123 is a deficient number, since it is larger than the sum of its proper divisors (102608677).

402140123 is a wasteful number, since it uses less digits than its factorization.

402140123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35218.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 402140123 is about 20053.4317013323. The cubic root of 402140123 is about 738.1180099083.

Adding to 402140123 its reverse (321041204), we get a palindrome (723181327).

It can be divided in two parts, 4021 and 40123, that added together give a palindrome (44144).

The spelling of 402140123 in words is "four hundred two million, one hundred forty thousand, one hundred twenty-three".