123401580 has 48 divisors (see below), whose sum is σ = 363713280. Its totient is φ = 31174848.

The previous prime is 123401573. The next prime is 123401581. The reversal of 123401580 is 85104321.

It is a self number, because there is not a number n which added to its sum of digits gives 123401580.

It is not an unprimeable number, because it can be changed into a prime (123401581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52984 + ... + 55263.

It is an arithmetic number, because the mean of its divisors is an integer number (7577360).

Almost surely, 2^123401580 is an apocalyptic number.

123401580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123401580 is an abundant number, since it is smaller than the sum of its proper divisors (240311700).

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

123401580 is a wasteful number, since it uses less digits than its factorization.

123401580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108278 (or 108276 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 123401580 is about 11108.6263777301. The cubic root of 123401580 is about 497.8596239884.

The spelling of 123401580 in words is "one hundred twenty-three million, four hundred one thousand, five hundred eighty".