720207145 has 48 divisors (see below), whose sum is σ = 1027026000. Its totient is φ = 483356160.

The previous prime is 720207133. The next prime is 720207167. The reversal of 720207145 is 541702027.

It can be written as a sum of positive squares in 8 ways, for example, as 182709289 + 537497856 = 13517^2 + 23184^2 .

It is not a de Polignac number, because 720207145 - 2⁷ = 720207017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3978955 + ... + 3979135.

It is an arithmetic number, because the mean of its divisors is an integer number (21396375).

Almost surely, 2^720207145 is an apocalyptic number.

It is an amenable number.

720207145 is a deficient number, since it is larger than the sum of its proper divisors (306818855).

720207145 is a wasteful number, since it uses less digits than its factorization.

720207145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 720207145 is about 26836.6753715880. The cubic root of 720207145 is about 896.3668948277.

The spelling of 720207145 in words is "seven hundred twenty million, two hundred seven thousand, one hundred forty-five".