123458642 has 4 divisors (see below), whose sum is σ = 185187966. Its totient is φ = 61729320.

The previous prime is 123458611. The next prime is 123458681. The reversal of 123458642 is 246854321.

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., 121638841 + 1819801 = 11029^2 + 1349^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30864659 + ... + 30864662.

Almost surely, 2^123458642 is an apocalyptic number.

123458642 is a deficient number, since it is larger than the sum of its proper divisors (61729324).

123458642 is an equidigital number, since it uses as much as digits as its factorization.

123458642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61729323.

The product of its digits is 46080, while the sum is 35.

The square root of 123458642 is about 11111.1944452430. The cubic root of 123458642 is about 497.9363504186.

The spelling of 123458642 in words is "one hundred twenty-three million, four hundred fifty-eight thousand, six hundred forty-two".