123540790 has 16 divisors (see below), whose sum is σ = 227797920. Its totient is φ = 48210880.

The previous prime is 123540761. The next prime is 123540803. The reversal of 123540790 is 97045321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150250 + ... + 151069.

It is an arithmetic number, because the mean of its divisors is an integer number (14237370).

Almost surely, 2^123540790 is an apocalyptic number.

123540790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123540790 is a deficient number, since it is larger than the sum of its proper divisors (104257130).

123540790 is a wasteful number, since it uses less digits than its factorization.

123540790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301367.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 123540790 is about 11114.8904627981. The cubic root of 123540790 is about 498.0467663591.

It can be divided in two parts, 1235 and 40790, that added together give a square (42025 = 205²).

The spelling of 123540790 in words is "one hundred twenty-three million, five hundred forty thousand, seven hundred ninety".