123571240 has 64 divisors (see below), whose sum is σ = 303730560. Its totient is φ = 44970240.

The previous prime is 123571223. The next prime is 123571241. The reversal of 123571240 is 42175321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (123571241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35247 + ... + 38593.

It is an arithmetic number, because the mean of its divisors is an integer number (4745790).

Almost surely, 2^123571240 is an apocalyptic number.

123571240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123571240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151865280).

123571240 is an abundant number, since it is smaller than the sum of its proper divisors (180159320).

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

123571240 is a wasteful number, since it uses less digits than its factorization.

123571240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 123571240 is about 11116.2601624827. The cubic root of 123571240 is about 498.0876820713.

The spelling of 123571240 in words is "one hundred twenty-three million, five hundred seventy-one thousand, two hundred forty".