1490639 has 2 divisors, whose sum is σ = 1490640. Its totient is φ = 1490638.

The previous prime is 1490633. The next prime is 1490641. The reversal of 1490639 is 9360941.

It is a strong prime.

It is an emirp because it is prime and its reverse (9360941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1490639 is a prime.

Together with 1490641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1490633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745319 + 745320.

It is an arithmetic number, because the mean of its divisors is an integer number (745320).

2^1490639 is an apocalyptic number.

1490639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1490639 is an equidigital number, since it uses as much as digits as its factorization.

1490639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1490639 is about 1220.9172781151. The cubic root of 1490639 is about 114.2328011752.

The spelling of 1490639 in words is "one million, four hundred ninety thousand, six hundred thirty-nine".