1722725045 has 4 divisors (see below), whose sum is σ = 2067270060. Its totient is φ = 1378180032.

The previous prime is 1722725027. The next prime is 1722725071. The reversal of 1722725045 is 5405272271.

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 1085768401 + 636956644 = 32951^2 + 25238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1722725045 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1722724996 and 1722725014.

It is a congruent number.

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, 172272500 + ... + 172272509.

It is an arithmetic number, because the mean of its divisors is an integer number (516817515).

Almost surely, 2^1722725045 is an apocalyptic number.

It is an amenable number.

1722725045 is a deficient number, since it is larger than the sum of its proper divisors (344545015).

1722725045 is an equidigital number, since it uses as much as digits as its factorization.

1722725045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344545014.

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 1722725045 is about 41505.7230391184. The cubic root of 1722725045 is about 1198.7777010122. Note that the first 4 decimals are identical.

The spelling of 1722725045 in words is "one billion, seven hundred twenty-two million, seven hundred twenty-five thousand, forty-five".