720250161 has 16 divisors (see below), whose sum is σ = 966401280. Its totient is φ = 477142400.

The previous prime is 720250159. The next prime is 720250163. The reversal of 720250161 is 161052027.

720250161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (720250159) and next prime (720250163).

It is a cyclic number.

It is not a de Polignac number, because 720250161 - 2¹ = 720250159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720250163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501901 + ... + 503333.

It is an arithmetic number, because the mean of its divisors is an integer number (60400080).

Almost surely, 2^720250161 is an apocalyptic number.

It is an amenable number.

720250161 is a deficient number, since it is larger than the sum of its proper divisors (246151119).

720250161 is a wasteful number, since it uses less digits than its factorization.

720250161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 720250161 is about 26837.4768001763. The cubic root of 720250161 is about 896.3847403189.

The spelling of 720250161 in words is "seven hundred twenty million, two hundred fifty thousand, one hundred sixty-one".