1981130 has 16 divisors (see below), whose sum is σ = 3754080. Its totient is φ = 750672.

The previous prime is 1981099. The next prime is 1981141. The reversal of 1981130 is 311891.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1981096 and 1981105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5024 + ... + 5403.

It is an arithmetic number, because the mean of its divisors is an integer number (234630).

2^1981130 is an apocalyptic number.

1981130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1981130 is a deficient number, since it is larger than the sum of its proper divisors (1772950).

1981130 is a wasteful number, since it uses less digits than its factorization.

1981130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1981130 is about 1407.5261986905. The cubic root of 1981130 is about 125.5946070547.

The spelling of 1981130 in words is "one million, nine hundred eighty-one thousand, one hundred thirty".