1725072145 has 4 divisors (see below), whose sum is σ = 2070086580. Its totient is φ = 1380057712.

The previous prime is 1725072121. The next prime is 1725072179. The reversal of 1725072145 is 5412705271.

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 1172446081 + 552626064 = 34241^2 + 23508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1725072145 - 2⁹ = 1725071633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1725072145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172507210 + ... + 172507219.

It is an arithmetic number, because the mean of its divisors is an integer number (517521645).

Almost surely, 2^1725072145 is an apocalyptic number.

It is an amenable number.

1725072145 is a deficient number, since it is larger than the sum of its proper divisors (345014435).

1725072145 is an equidigital number, since it uses as much as digits as its factorization.

1725072145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345014434.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 1725072145 is about 41533.9878292465. The cubic root of 1725072145 is about 1199.3218726453.

The spelling of 1725072145 in words is "one billion, seven hundred twenty-five million, seventy-two thousand, one hundred forty-five".