724121085 has 16 divisors (see below), whose sum is σ = 1159574976. Its totient is φ = 385870848.

The previous prime is 724121081. The next prime is 724121149. The reversal of 724121085 is 580121427.

It is not a de Polignac number, because 724121085 - 2² = 724121081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724121081) 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, 1579 + ... + 38088.

It is an arithmetic number, because the mean of its divisors is an integer number (72473436).

Almost surely, 2^724121085 is an apocalyptic number.

It is an amenable number.

724121085 is a deficient number, since it is larger than the sum of its proper divisors (435453891).

724121085 is a wasteful number, since it uses less digits than its factorization.

724121085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40892.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 724121085 is about 26909.4980443709. The cubic root of 724121085 is about 897.9877202138.

The spelling of 724121085 in words is "seven hundred twenty-four million, one hundred twenty-one thousand, eighty-five".