1981941 has 16 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 1203840.

The previous prime is 1981939. The next prime is 1981949. The reversal of 1981941 is 1491891.

1981941 = 103² + 104² + ... + 191².

It is not a de Polignac number, because 1981941 - 2¹ = 1981939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3186 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

2^1981941 is an apocalyptic number.

It is an amenable number.

1981941 is a deficient number, since it is larger than the sum of its proper divisors (900939).

1981941 is a wasteful number, since it uses less digits than its factorization.

1981941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its digits is 2592, while the sum is 33.

The square root of 1981941 is about 1407.8142633174. The cubic root of 1981941 is about 125.6117426172.

The spelling of 1981941 in words is "one million, nine hundred eighty-one thousand, nine hundred forty-one".