1685429 has 2 divisors, whose sum is σ = 1685430. Its totient is φ = 1685428.

The previous prime is 1685423. The next prime is 1685441. The reversal of 1685429 is 9245861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684804 + 625 = 1298^2 + 25^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685429 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842714 + 842715.

It is an arithmetic number, because the mean of its divisors is an integer number (842715).

2^1685429 is an apocalyptic number.

It is an amenable number.

1685429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685429 is an equidigital number, since it uses as much as digits as its factorization.

1685429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 1685429 is about 1298.2407326840. The cubic root of 1685429 is about 119.0063551440.

The spelling of 1685429 in words is "one million, six hundred eighty-five thousand, four hundred twenty-nine".