720017225 has 12 divisors (see below), whose sum is σ = 916952844. Its totient is φ = 560445120.

The previous prime is 720017219. The next prime is 720017227. The reversal of 720017225 is 522710027.

It can be written as a sum of positive squares in 6 ways, for example, as 9634816 + 710382409 = 3104^2 + 26653^2 .

It is not a de Polignac number, because 720017225 - 2⁶ = 720017161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720017194 and 720017203.

It is not an unprimeable number, because it can be changed into a prime (720017227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388274 + ... + 390123.

It is an arithmetic number, because the mean of its divisors is an integer number (76412737).

Almost surely, 2^720017225 is an apocalyptic number.

It is an amenable number.

720017225 is a deficient number, since it is larger than the sum of its proper divisors (196935619).

720017225 is a wasteful number, since it uses less digits than its factorization.

720017225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778444 (or 778439 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 720017225 is about 26833.1366970021. The cubic root of 720017225 is about 896.2880966801.

The spelling of 720017225 in words is "seven hundred twenty million, seventeen thousand, two hundred twenty-five".