724105145 has 4 divisors (see below), whose sum is σ = 868926180. Its totient is φ = 579284112.

The previous prime is 724105139. The next prime is 724105163. The reversal of 724105145 is 541501427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 332223529 + 391881616 = 18227^2 + 19796^2 .

It is a cyclic number.

It is not a de Polignac number, because 724105145 - 2²⁰ = 723056569 is a prime.

It is a super-2 number, since 2×724105145² = 1048656522030942050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72410510 + ... + 72410519.

It is an arithmetic number, because the mean of its divisors is an integer number (217231545).

Almost surely, 2^724105145 is an apocalyptic number.

It is an amenable number.

724105145 is a deficient number, since it is larger than the sum of its proper divisors (144821035).

724105145 is a wasteful number, since it uses less digits than its factorization.

724105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144821034.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 724105145 is about 26909.2018647897. The cubic root of 724105145 is about 897.9811310629.

The spelling of 724105145 in words is "seven hundred twenty-four million, one hundred five thousand, one hundred forty-five".