720537122 has 8 divisors (see below), whose sum is σ = 1085445036. Its totient is φ = 358722112.

The previous prime is 720537107. The next prime is 720537143. The reversal of 720537122 is 221735027.

It can be written as a sum of positive squares in 2 ways, for example, as 717650521 + 2886601 = 26789^2 + 1699^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772643 + ... + 773574.

Almost surely, 2^720537122 is an apocalyptic number.

720537122 is a deficient number, since it is larger than the sum of its proper divisors (364907914).

720537122 is a wasteful number, since it uses less digits than its factorization.

720537122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546452.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 720537122 is about 26842.8225416032. The cubic root of 720537122 is about 896.5037699383.

The spelling of 720537122 in words is "seven hundred twenty million, five hundred thirty-seven thousand, one hundred twenty-two".