1725121 has 2 divisors, whose sum is σ = 1725122. Its totient is φ = 1725120.

The previous prime is 1725091. The next prime is 1725127. The reversal of 1725121 is 1215271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 6400 = 1311^2 + 80^2 .

It is an emirp because it is prime and its reverse (1215271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1725121 - 2⁵ = 1725089 is a prime.

1725121 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1725127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 862560 + 862561.

It is an arithmetic number, because the mean of its divisors is an integer number (862561).

2^1725121 is an apocalyptic number.

It is an amenable number.

1725121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1725121 is an equidigital number, since it uses as much as digits as its factorization.

1725121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140, while the sum is 19.

The square root of 1725121 is about 1313.4386167614. The cubic root of 1725121 is about 119.9333194359.

The spelling of 1725121 in words is "one million, seven hundred twenty-five thousand, one hundred twenty-one".