137452720 has 20 divisors (see below), whose sum is σ = 319577760. Its totient is φ = 54981056.

The previous prime is 137452717. The next prime is 137452747. The reversal of 137452720 is 27254731.

137452720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859000 + ... + 859159.

It is an arithmetic number, because the mean of its divisors is an integer number (15978888).

Almost surely, 2^137452720 is an apocalyptic number.

137452720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137452720 is an abundant number, since it is smaller than the sum of its proper divisors (182125040).

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

137452720 is a wasteful number, since it uses less digits than its factorization.

137452720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718172 (or 1718166 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 137452720 is about 11724.0232002500. The cubic root of 137452720 is about 516.0808919112.

The spelling of 137452720 in words is "one hundred thirty-seven million, four hundred fifty-two thousand, seven hundred twenty".