1625717245 has 4 divisors (see below), whose sum is σ = 1950860700. Its totient is φ = 1300573792.

The previous prime is 1625717207. The next prime is 1625717287. The reversal of 1625717245 is 5427175261.

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 1174707076 + 451010169 = 34274^2 + 21237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625717245 - 2⁹ = 1625716733 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1625717198 and 1625717207.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 162571720 + ... + 162571729.

It is an arithmetic number, because the mean of its divisors is an integer number (487715175).

Almost surely, 2^1625717245 is an apocalyptic number.

It is an amenable number.

1625717245 is a deficient number, since it is larger than the sum of its proper divisors (325143455).

1625717245 is an equidigital number, since it uses as much as digits as its factorization.

1625717245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325143454.

The product of its digits is 117600, while the sum is 40.

The square root of 1625717245 is about 40320.1840893615. The cubic root of 1625717245 is about 1175.8402910380.

The spelling of 1625717245 in words is "one billion, six hundred twenty-five million, seven hundred seventeen thousand, two hundred forty-five".