1725979 has 4 divisors (see below), whose sum is σ = 1816840. Its totient is φ = 1635120.

The previous prime is 1725967. The next prime is 1725991. The reversal of 1725979 is 9795271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9795271 = 43 ⋅227797.

It is an interprime number because it is at equal distance from previous prime (1725967) and next prime (1725991).

It is a cyclic number.

It is not a de Polignac number, because 1725979 - 2⁵ = 1725947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1725929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45402 + ... + 45439.

It is an arithmetic number, because the mean of its divisors is an integer number (454210).

2^1725979 is an apocalyptic number.

1725979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1725979 is a deficient number, since it is larger than the sum of its proper divisors (90861).

1725979 is an equidigital number, since it uses as much as digits as its factorization.

1725979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90860.

The product of its digits is 39690, while the sum is 40.

The square root of 1725979 is about 1313.7651997218. The cubic root of 1725979 is about 119.9531993425.

It can be divided in two parts, 1725 and 979, that added together give a square (2704 = 52²).

The spelling of 1725979 in words is "one million, seven hundred twenty-five thousand, nine hundred seventy-nine".