123749140 has 12 divisors (see below), whose sum is σ = 259873236. Its totient is φ = 49499648.

The previous prime is 123749123. The next prime is 123749159. The reversal of 123749140 is 41947321.

It can be written as a sum of positive squares in 2 ways, for example, as 14002564 + 109746576 = 3742^2 + 10476^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3093709 + ... + 3093748.

It is an arithmetic number, because the mean of its divisors is an integer number (21656103).

Almost surely, 2^123749140 is an apocalyptic number.

123749140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123749140 is an abundant number, since it is smaller than the sum of its proper divisors (136124096).

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

123749140 is a wasteful number, since it uses less digits than its factorization.

123749140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187466 (or 6187464 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 123749140 is about 11124.2590764509. The cubic root of 123749140 is about 498.3265923282.

The spelling of 123749140 in words is "one hundred twenty-three million, seven hundred forty-nine thousand, one hundred forty".