721112253 has 4 divisors (see below), whose sum is σ = 961483008. Its totient is φ = 480741500.

The previous prime is 721112243. The next prime is 721112257. The reversal of 721112253 is 352211127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 721112253 - 2⁵ = 721112221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721112257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120185373 + ... + 120185378.

It is an arithmetic number, because the mean of its divisors is an integer number (240370752).

Almost surely, 2^721112253 is an apocalyptic number.

It is an amenable number.

721112253 is a deficient number, since it is larger than the sum of its proper divisors (240370755).

721112253 is a wasteful number, since it uses less digits than its factorization.

721112253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240370754.

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

The square root of 721112253 is about 26853.5333429327. The cubic root of 721112253 is about 896.7422355539.

The spelling of 721112253 in words is "seven hundred twenty-one million, one hundred twelve thousand, two hundred fifty-three".