1725816145 has 8 divisors (see below), whose sum is σ = 2071292904. Its totient is φ = 1380443904.

The previous prime is 1725816133. The next prime is 1725816163. The reversal of 1725816145 is 5416185271.

It can be written as a sum of positive squares in 4 ways, for example, as 520615489 + 1205200656 = 22817^2 + 34716^2 .

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 1725816145 - 2²¹ = 1723718993 is a prime.

It is a super-2 number, since 2×1725816145² = 5956882732685322050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1725816098 and 1725816107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16537 + ... + 61033.

It is an arithmetic number, because the mean of its divisors is an integer number (258911613).

Almost surely, 2^1725816145 is an apocalyptic number.

It is an amenable number.

1725816145 is a deficient number, since it is larger than the sum of its proper divisors (345476759).

1725816145 is an equidigital number, since it uses as much as digits as its factorization.

1725816145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52259.

The product of its digits is 67200, while the sum is 40.

The square root of 1725816145 is about 41542.9433839250. The cubic root of 1725816145 is about 1199.4942648992.

The spelling of 1725816145 in words is "one billion, seven hundred twenty-five million, eight hundred sixteen thousand, one hundred forty-five".