1981075 has 12 divisors (see below), whose sum is σ = 2482480. Its totient is φ = 1568160.

The previous prime is 1981037. The next prime is 1981081. The reversal of 1981075 is 5701891.

It is not a de Polignac number, because 1981075 - 2⁷ = 1980947 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2362 + ... + 3088.

2^1981075 is an apocalyptic number.

1981075 is a deficient number, since it is larger than the sum of its proper divisors (501405).

1981075 is a wasteful number, since it uses less digits than its factorization.

1981075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 1981075 is about 1407.5066607302. The cubic root of 1981075 is about 125.5934447943.

The spelling of 1981075 in words is "one million, nine hundred eighty-one thousand, seventy-five".