720725131 has 8 divisors (see below), whose sum is σ = 834969824. Its totient is φ = 609301440.

The previous prime is 720725051. The next prime is 720725141. The reversal of 720725131 is 131527027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720725131 - 2¹³ = 720716939 is a prime.

It is a super-2 number, since 2×720725131² = 1038889428909934322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720725131.

It is not an unprimeable number, because it can be changed into a prime (720725141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704700 + ... + 705721.

It is an arithmetic number, because the mean of its divisors is an integer number (104371228).

Almost surely, 2^720725131 is an apocalyptic number.

720725131 is a deficient number, since it is larger than the sum of its proper divisors (114244693).

720725131 is a wasteful number, since it uses less digits than its factorization.

720725131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410501.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 720725131 is about 26846.3243480369. The cubic root of 720725131 is about 896.5817377553.

The spelling of 720725131 in words is "seven hundred twenty million, seven hundred twenty-five thousand, one hundred thirty-one".