1490641 has 2 divisors, whose sum is σ = 1490642. Its totient is φ = 1490640.

The previous prime is 1490639. The next prime is 1490647. The reversal of 1490641 is 1460941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 450241 = 1020^2 + 671^2 .

It is an emirp because it is prime and its reverse (1460941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1490641 - 2¹ = 1490639 is a prime.

Together with 1490639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1490647) 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 as a sum of consecutive naturals, namely, 745320 + 745321.

It is an arithmetic number, because the mean of its divisors is an integer number (745321).

2^1490641 is an apocalyptic number.

It is an amenable number.

1490641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490641 is an equidigital number, since it uses as much as digits as its factorization.

1490641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1490641 is about 1220.9180971711. The cubic root of 1490641 is about 114.2328522641.

The spelling of 1490641 in words is "one million, four hundred ninety thousand, six hundred forty-one".