1490581 has 4 divisors (see below), whose sum is σ = 1493964. Its totient is φ = 1487200.

The previous prime is 1490557. The next prime is 1490591. The reversal of 1490581 is 1850941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 864900 = 791^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490581 - 2¹¹ = 1488533 is a prime.

It is a super-2 number, since 2×1490581² = 4443663435122, which contains 22 as substring.

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

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490591) 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 3 ways as a sum of consecutive naturals, for example, 910 + ... + 1951.

It is an arithmetic number, because the mean of its divisors is an integer number (373491).

2^1490581 is an apocalyptic number.

It is an amenable number.

1490581 is a deficient number, since it is larger than the sum of its proper divisors (3383).

1490581 is an equidigital number, since it uses as much as digits as its factorization.

1490581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1490581 is about 1220.8935252511. The cubic root of 1490581 is about 114.2313195761.

The spelling of 1490581 in words is "one million, four hundred ninety thousand, five hundred eighty-one".