1720125 has 48 divisors (see below), whose sum is σ = 3407040. Its totient is φ = 828000.

The previous prime is 1720123. The next prime is 1720133. The reversal of 1720125 is 5210271.

It is not a de Polignac number, because 1720125 - 2¹ = 1720123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1720098 and 1720107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12306 + ... + 12444.

It is an arithmetic number, because the mean of its divisors is an integer number (70980).

2^1720125 is an apocalyptic number.

1720125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1720125 is a deficient number, since it is larger than the sum of its proper divisors (1686915).

1720125 is a wasteful number, since it uses less digits than its factorization.

1720125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1720125 is about 1311.5353597978. The cubic root of 1720125 is about 119.8174307113.

Adding to 1720125 its reverse (5210271), we get a palindrome (6930396).

The spelling of 1720125 in words is "one million, seven hundred twenty thousand, one hundred twenty-five".