1895981 has 2 divisors, whose sum is σ = 1895982. Its totient is φ = 1895980.

The previous prime is 1895939. The next prime is 1895989.

1895981 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 538756 = 1165^2 + 734^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1895981 - 2¹⁴ = 1879597 is a prime.

It is a super-2 number, since 2×1895981² = 7189487904722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1895989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947990 + 947991.

It is an arithmetic number, because the mean of its divisors is an integer number (947991).

2^1895981 is an apocalyptic number.

It is an amenable number.

1895981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1895981 is an equidigital number, since it uses as much as digits as its factorization.

1895981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 41.

The square root of 1895981 is about 1376.9462589368. The cubic root of 1895981 is about 123.7688418068.

The spelling of 1895981 in words is "one million, eight hundred ninety-five thousand, nine hundred eighty-one".