123154142 has 4 divisors (see below), whose sum is σ = 184731216. Its totient is φ = 61577070.

The previous prime is 123154123. The next prime is 123154153. The reversal of 123154142 is 241451321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30788534 + ... + 30788537.

It is an arithmetic number, because the mean of its divisors is an integer number (46182804).

Almost surely, 2^123154142 is an apocalyptic number.

123154142 is a deficient number, since it is larger than the sum of its proper divisors (61577074).

123154142 is an equidigital number, since it uses as much as digits as its factorization.

123154142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61577073.

The product of its digits is 960, while the sum is 23.

The square root of 123154142 is about 11097.4835886340. The cubic root of 123154142 is about 497.5266411665.

The spelling of 123154142 in words is "one hundred twenty-three million, one hundred fifty-four thousand, one hundred forty-two".