1490681 has 4 divisors (see below), whose sum is σ = 1525392. Its totient is φ = 1455972.

The previous prime is 1490677. The next prime is 1490701. The reversal of 1490681 is 1860941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1490681 - 2² = 1490677 is a prime.

It is a super-2 number, since 2×1490681² = 4444259687522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1490641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17291 + ... + 17376.

It is an arithmetic number, because the mean of its divisors is an integer number (381348).

2^1490681 is an apocalyptic number.

It is an amenable number.

1490681 is a deficient number, since it is larger than the sum of its proper divisors (34711).

1490681 is an equidigital number, since it uses as much as digits as its factorization.

1490681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34710.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1490681 is about 1220.9344781764. The cubic root of 1490681 is about 114.2338740333.

The spelling of 1490681 in words is "one million, four hundred ninety thousand, six hundred eighty-one".