123144402 has 16 divisors (see below), whose sum is σ = 252296352. Its totient is φ = 40046880.

The previous prime is 123144383. The next prime is 123144449. The reversal of 123144402 is 204441321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250048 + ... + 250539.

It is an arithmetic number, because the mean of its divisors is an integer number (15768522).

Almost surely, 2^123144402 is an apocalyptic number.

123144402 is an abundant number, since it is smaller than the sum of its proper divisors (129151950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123144402 is a wasteful number, since it uses less digits than its factorization.

123144402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500633.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 123144402 is about 11097.0447417319. The cubic root of 123144402 is about 497.5135247117.

Adding to 123144402 its reverse (204441321), we get a palindrome (327585723).

The spelling of 123144402 in words is "one hundred twenty-three million, one hundred forty-four thousand, four hundred two".