1490409 has 6 divisors (see below), whose sum is σ = 2152826. Its totient is φ = 993600.

The previous prime is 1490381. The next prime is 1490429. The reversal of 1490409 is 9040941.

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 57600 = 1197^2 + 240^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1490409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1490429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82792 + ... + 82809.

2^1490409 is an apocalyptic number.

It is an amenable number.

1490409 is a deficient number, since it is larger than the sum of its proper divisors (662417).

1490409 is a wasteful number, since it uses less digits than its factorization.

1490409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165607 (or 165604 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1490409 is about 1220.8230830059. The cubic root of 1490409 is about 114.2269256422.

The spelling of 1490409 in words is "one million, four hundred ninety thousand, four hundred nine".