123742280 has 32 divisors (see below), whose sum is σ = 283678200. Its totient is φ = 48562176.

The previous prime is 123742273. The next prime is 123742291. The reversal of 123742280 is 82247321.

It can be written as a sum of positive squares in 4 ways, for example, as 110796676 + 12945604 = 10526^2 + 3598^2 .

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, 27065 + ... + 31304.

Almost surely, 2^123742280 is an apocalyptic number.

123742280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123742280 is an abundant number, since it is smaller than the sum of its proper divisors (159935920).

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

123742280 is a wasteful number, since it uses less digits than its factorization.

123742280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58433 (or 58429 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 123742280 is about 11123.9507370358. The cubic root of 123742280 is about 498.3173839583.

The spelling of 123742280 in words is "one hundred twenty-three million, seven hundred forty-two thousand, two hundred eighty".