402430123 has 4 divisors (see below), whose sum is σ = 402984400. Its totient is φ = 401875848.

The previous prime is 402430117. The next prime is 402430139. The reversal of 402430123 is 321034204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402430123 - 2⁹ = 402429611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402430123.

It is not an unprimeable number, because it can be changed into a prime (402436123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276048 + ... + 277501.

It is an arithmetic number, because the mean of its divisors is an integer number (100746100).

Almost surely, 2^402430123 is an apocalyptic number.

402430123 is a deficient number, since it is larger than the sum of its proper divisors (554277).

402430123 is an equidigital number, since it uses as much as digits as its factorization.

402430123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554276.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 402430123 is about 20060.6610808318. The cubic root of 402430123 is about 738.2953964930.

Adding to 402430123 its reverse (321034204), we get a palindrome (723464327).

The spelling of 402430123 in words is "four hundred two million, four hundred thirty thousand, one hundred twenty-three".