1981494 has 12 divisors (see below), whose sum is σ = 4293276. Its totient is φ = 660492.

The previous prime is 1981493. The next prime is 1981513. The reversal of 1981494 is 4941891.

It is a super-3 number, since 3×1981494³ = 23339929483285505352, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55024 + ... + 55059.

It is an arithmetic number, because the mean of its divisors is an integer number (357773).

2^1981494 is an apocalyptic number.

1981494 is an abundant number, since it is smaller than the sum of its proper divisors (2311782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1981494 is a wasteful number, since it uses less digits than its factorization.

1981494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110091 (or 110088 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1981494 is about 1407.6554976272. The cubic root of 1981494 is about 125.6022985637.

The spelling of 1981494 in words is "one million, nine hundred eighty-one thousand, four hundred ninety-four".