123857854 has 4 divisors (see below), whose sum is σ = 185786784. Its totient is φ = 61928926.

The previous prime is 123857849. The next prime is 123857857. The reversal of 123857854 is 458758321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 458758321 = 7 ⋅65536903.

It is a self number, because there is not a number n which added to its sum of digits gives 123857854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123857857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30964462 + ... + 30964465.

It is an arithmetic number, because the mean of its divisors is an integer number (46446696).

Almost surely, 2^123857854 is an apocalyptic number.

123857854 is a deficient number, since it is larger than the sum of its proper divisors (61928930).

123857854 is an equidigital number, since it uses as much as digits as its factorization.

123857854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61928929.

The product of its digits is 268800, while the sum is 43.

The square root of 123857854 is about 11129.1443516562. The cubic root of 123857854 is about 498.4724767645.

The spelling of 123857854 in words is "one hundred twenty-three million, eight hundred fifty-seven thousand, eight hundred fifty-four".