123340425434 has 4 divisors (see below), whose sum is σ = 185010638154. Its totient is φ = 61670212716.

The previous prime is 123340425427. The next prime is 123340425449. The reversal of 123340425434 is 434524043321.

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

It can be written as a sum of positive squares in only one way, i.e., 75403512409 + 47936913025 = 274597^2 + 218945^2 .

It is a super-2 number, since 2×123340425434² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123340425394 and 123340425403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30835106357 + ... + 30835106360.

Almost surely, 2^123340425434 is an apocalyptic number.

123340425434 is a deficient number, since it is larger than the sum of its proper divisors (61670212720).

123340425434 is an equidigital number, since it uses as much as digits as its factorization.

123340425434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61670212719.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 123340425434 its reverse (434524043321), we get a palindrome (557864468755).

The spelling of 123340425434 in words is "one hundred twenty-three billion, three hundred forty million, four hundred twenty-five thousand, four hundred thirty-four".