123171240 has 32 divisors (see below), whose sum is σ = 369514080. Its totient is φ = 32845632.

The previous prime is 123171227. The next prime is 123171247. The reversal of 123171240 is 42171321.

It is not an unprimeable number, because it can be changed into a prime (123171247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513094 + ... + 513333.

It is an arithmetic number, because the mean of its divisors is an integer number (11547315).

Almost surely, 2^123171240 is an apocalyptic number.

123171240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123171240 is an abundant number, since it is smaller than the sum of its proper divisors (246342840).

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

123171240 is a wasteful number, since it uses less digits than its factorization.

123171240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026441 (or 1026437 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 123171240 is about 11098.2539167204. The cubic root of 123171240 is about 497.5496646630.

The spelling of 123171240 in words is "one hundred twenty-three million, one hundred seventy-one thousand, two hundred forty".