724770121 has 4 divisors (see below), whose sum is σ = 729634500. Its totient is φ = 719905744.

The previous prime is 724770107. The next prime is 724770131. The reversal of 724770121 is 121077427.

724770121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121077427 = 103 ⋅1175509.

It can be written as a sum of positive squares in 2 ways, for example, as 31764496 + 693005625 = 5636^2 + 26325^2 .

It is a cyclic number.

It is not a de Polignac number, because 724770121 - 2¹³ = 724761929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724770131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2431966 + ... + 2432263.

It is an arithmetic number, because the mean of its divisors is an integer number (182408625).

Almost surely, 2^724770121 is an apocalyptic number.

It is an amenable number.

724770121 is a deficient number, since it is larger than the sum of its proper divisors (4864379).

724770121 is a wasteful number, since it uses less digits than its factorization.

724770121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4864378.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 724770121 is about 26921.5549513768. The cubic root of 724770121 is about 898.2559314867.

The spelling of 724770121 in words is "seven hundred twenty-four million, seven hundred seventy thousand, one hundred twenty-one".