1675981 has 2 divisors, whose sum is σ = 1675982. Its totient is φ = 1675980.

The previous prime is 1675967. The next prime is 1675991. The reversal of 1675981 is 1895761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1664100 + 11881 = 1290^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1675981 - 2¹¹ = 1673933 is a prime.

It is a super-2 number, since 2×1675981² = 5617824624722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1675981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1675931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 837990 + 837991.

It is an arithmetic number, because the mean of its divisors is an integer number (837991).

2^1675981 is an apocalyptic number.

It is an amenable number.

1675981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1675981 is an equidigital number, since it uses as much as digits as its factorization.

1675981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 37.

The square root of 1675981 is about 1294.5968484436. The cubic root of 1675981 is about 118.7835672419.

The spelling of 1675981 in words is "one million, six hundred seventy-five thousand, nine hundred eighty-one".