1725989 has 8 divisors (see below), whose sum is σ = 1821312. Its totient is φ = 1632400.

The previous prime is 1725967. The next prime is 1725991. The reversal of 1725989 is 9895271.

1725989 = T₁₆ + T₁₇ + ... + T₂₁₇.

1725989 = 36² + 37² + ... + 173².

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 1725989 - 2¹² = 1721893 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1952 + ... + 2694.

It is an arithmetic number, because the mean of its divisors is an integer number (227664).

2^1725989 is an apocalyptic number.

It is an amenable number.

1725989 is a deficient number, since it is larger than the sum of its proper divisors (95323).

1725989 is a wasteful number, since it uses less digits than its factorization.

1725989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867.

The product of its digits is 45360, while the sum is 41.

The square root of 1725989 is about 1313.7690055714. The cubic root of 1725989 is about 119.9534310042.

The spelling of 1725989 in words is "one million, seven hundred twenty-five thousand, nine hundred eighty-nine".