1725978243 has 16 divisors (see below), whose sum is σ = 2531267712. Its totient is φ = 1046045000.

The previous prime is 1725978217. The next prime is 1725978251. The reversal of 1725978243 is 3428795271.

It is a happy number.

It is not a de Polignac number, because 1725978243 - 2⁸ = 1725977987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1725978192 and 1725978201.

It is not an unprimeable number, because it can be changed into a prime (1725978203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212133 + ... + 220118.

It is an arithmetic number, because the mean of its divisors is an integer number (158204232).

Almost surely, 2^1725978243 is an apocalyptic number.

1725978243 is a deficient number, since it is larger than the sum of its proper divisors (805289469).

1725978243 is an equidigital number, since it uses as much as digits as its factorization.

1725978243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432287 (or 432265 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 1725978243 is about 41544.8943072431. The cubic root of 1725978243 is about 1199.5318180563.

The spelling of 1725978243 in words is "one billion, seven hundred twenty-five million, nine hundred seventy-eight thousand, two hundred forty-three".