981490 has 16 divisors (see below), whose sum is σ = 1796760. Its totient is φ = 385920.

The previous prime is 981481. The next prime is 981493. The reversal of 981490 is 94189.

It can be written as a sum of positive squares in 4 ways, for example, as 797449 + 184041 = 893^2 + 429^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (981493) by changing a digit.

981490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195 + ... + 1414.

2⁹⁸¹⁴⁹⁰ is an apocalyptic number.

981490 is a deficient number, since it is larger than the sum of its proper divisors (815270).

981490 is a wasteful number, since it uses less digits than its factorization.

981490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 981490 is about 990.7017714731. The cubic root of 981490 is about 99.3791534727.

It can be divided in two parts, 981 and 490, that multiplied together give a triangular number (480690 = T₉₈₀).

The spelling of 981490 in words is "nine hundred eighty-one thousand, four hundred ninety".