1721124245 has 8 divisors (see below), whose sum is σ = 2065711416. Its totient is φ = 1376657856.

The previous prime is 1721124239. The next prime is 1721124283. The reversal of 1721124245 is 5424211271.

It can be written as a sum of positive squares in 4 ways, for example, as 111028369 + 1610095876 = 10537^2 + 40126^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1721124245 - 2¹⁶ = 1721058709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4859 + ... + 58871.

It is an arithmetic number, because the mean of its divisors is an integer number (258213927).

Almost surely, 2^1721124245 is an apocalyptic number.

It is an amenable number.

1721124245 is a deficient number, since it is larger than the sum of its proper divisors (344587171).

1721124245 is an equidigital number, since it uses as much as digits as its factorization.

1721124245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60391.

The product of its digits is 4480, while the sum is 29.

The square root of 1721124245 is about 41486.4344695950. The cubic root of 1721124245 is about 1198.4062743488.

The spelling of 1721124245 in words is "one billion, seven hundred twenty-one million, one hundred twenty-four thousand, two hundred forty-five".