123011240 has 32 divisors (see below), whose sum is σ = 301937760. Its totient is φ = 44731200.

The previous prime is 123011221. The next prime is 123011293. The reversal of 123011240 is 42110321.

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, 139346 + ... + 140225.

It is an arithmetic number, because the mean of its divisors is an integer number (9435555).

Almost surely, 2^123011240 is an apocalyptic number.

123011240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123011240 is an abundant number, since it is smaller than the sum of its proper divisors (178926520).

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

123011240 is a wasteful number, since it uses less digits than its factorization.

123011240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279593 (or 279589 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 123011240 is about 11091.0432331679. The cubic root of 123011240 is about 497.3341315521.

Adding to 123011240 its reverse (42110321), we get a palindrome (165121561).

The spelling of 123011240 in words is "one hundred twenty-three million, eleven thousand, two hundred forty".