123135340 has 12 divisors (see below), whose sum is σ = 258584256. Its totient is φ = 49254128.

The previous prime is 123135319. The next prime is 123135349. The reversal of 123135340 is 43531321.

It is not an unprimeable number, because it can be changed into a prime (123135349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3078364 + ... + 3078403.

It is an arithmetic number, because the mean of its divisors is an integer number (21548688).

Almost surely, 2^123135340 is an apocalyptic number.

123135340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123135340 is an abundant number, since it is smaller than the sum of its proper divisors (135448916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123135340 is a wasteful number, since it uses less digits than its factorization.

123135340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156776 (or 6156774 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 123135340 is about 11096.6364273144. The cubic root of 123135340 is about 497.5013206702.

Adding to 123135340 its reverse (43531321), we get a palindrome (166666661).

The spelling of 123135340 in words is "one hundred twenty-three million, one hundred thirty-five thousand, three hundred forty".