981590 has 16 divisors (see below), whose sum is σ = 1785888. Its totient is φ = 388416.

The previous prime is 981587. The next prime is 981599. The reversal of 981590 is 95189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (111618).

2⁹⁸¹⁵⁹⁰ is an apocalyptic number.

981590 is a deficient number, since it is larger than the sum of its proper divisors (804298).

981590 is a wasteful number, since it uses less digits than its factorization.

981590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 981590 is about 990.7522394625. The cubic root of 981590 is about 99.3825284699.

The spelling of 981590 in words is "nine hundred eighty-one thousand, five hundred ninety".