123135770 has 32 divisors (see below), whose sum is σ = 238291200. Its totient is φ = 45665856.

The previous prime is 123135757. The next prime is 123135781. The reversal of 123135770 is 77531321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2036 + ... + 15824.

It is an arithmetic number, because the mean of its divisors is an integer number (7446600).

Almost surely, 2^123135770 is an apocalyptic number.

123135770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123135770 is a deficient number, since it is larger than the sum of its proper divisors (115155430).

123135770 is a wasteful number, since it uses less digits than its factorization.

123135770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13862.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 123135770 is about 11096.6558025380. The cubic root of 123135770 is about 497.5018997764.

The spelling of 123135770 in words is "one hundred twenty-three million, one hundred thirty-five thousand, seven hundred seventy".