1725641 has 2 divisors, whose sum is σ = 1725642. Its totient is φ = 1725640.

The previous prime is 1725617. The next prime is 1725671. The reversal of 1725641 is 1465271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 633616 = 1045^2 + 796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1725641 - 2¹⁰ = 1724617 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1725641.

It is not a weakly prime, because it can be changed into another prime (1725671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 862820 + 862821.

It is an arithmetic number, because the mean of its divisors is an integer number (862821).

2^1725641 is an apocalyptic number.

It is an amenable number.

1725641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1725641 is an equidigital number, since it uses as much as digits as its factorization.

1725641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 1725641 is about 1313.6365555206. The cubic root of 1725641 is about 119.9453686508.

The spelling of 1725641 in words is "one million, seven hundred twenty-five thousand, six hundred forty-one".