1940881 has 2 divisors, whose sum is σ = 1940882. Its totient is φ = 1940880.

The previous prime is 1940849. The next prime is 1940893. The reversal of 1940881 is 1880491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1904400 + 36481 = 1380^2 + 191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940881 - 2⁵ = 1940849 is a prime.

It is a super-2 number, since 2×1940881² = 7534038112322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1940821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970440 + 970441.

It is an arithmetic number, because the mean of its divisors is an integer number (970441).

2^1940881 is an apocalyptic number.

It is an amenable number.

1940881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940881 is an equidigital number, since it uses as much as digits as its factorization.

1940881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1940881 is about 1393.1550523901. The cubic root of 1940881 is about 124.7382469319.

The spelling of 1940881 in words is "one million, nine hundred forty thousand, eight hundred eighty-one".