1072720523 has 8 divisors (see below), whose sum is σ = 1226392800. Its totient is φ = 919154880.

The previous prime is 1072720511. The next prime is 1072720531. The reversal of 1072720523 is 3250272701.

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

It is not a de Polignac number, because 1072720523 - 2⁸ = 1072720267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072720423) 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, 3788 + ... + 46473.

It is an arithmetic number, because the mean of its divisors is an integer number (153299100).

Almost surely, 2^1072720523 is an apocalyptic number.

1072720523 is a deficient number, since it is larger than the sum of its proper divisors (153672277).

1072720523 is an equidigital number, since it uses as much as digits as its factorization.

1072720523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53317.

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

The square root of 1072720523 is about 32752.4124760299. The cubic root of 1072720523 is about 1023.6752341657.

The spelling of 1072720523 in words is "one billion, seventy-two million, seven hundred twenty thousand, five hundred twenty-three".