129974240 has 48 divisors (see below), whose sum is σ = 334983600. Its totient is φ = 47262720.

The previous prime is 129974203. The next prime is 129974249. The reversal of 129974240 is 42479921.

It is a junction number, because it is equal to n+sod(n) for n = 129974194 and 129974203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129974249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35165 + ... + 38684.

It is an arithmetic number, because the mean of its divisors is an integer number (6978825).

Almost surely, 2^129974240 is an apocalyptic number.

129974240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129974240 is an abundant number, since it is smaller than the sum of its proper divisors (205009360).

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

129974240 is a wasteful number, since it uses less digits than its factorization.

129974240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73875 (or 73867 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 129974240 is about 11400.6245442958. The cubic root of 129974240 is about 506.5462394610.

The spelling of 129974240 in words is "one hundred twenty-nine million, nine hundred seventy-four thousand, two hundred forty".