1490909 has 4 divisors (see below), whose sum is σ = 1703904. Its totient is φ = 1277916.

The previous prime is 1490899. The next prime is 1490921. The reversal of 1490909 is 9090941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9090941 = 479 ⋅18979.

It is a cyclic number.

It is not a de Polignac number, because 1490909 - 2⁴ = 1490893 is a prime.

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

It is a Duffinian number.

1490909 is a modest number, since divided by 909 gives 149 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490959) 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, 106487 + ... + 106500.

It is an arithmetic number, because the mean of its divisors is an integer number (425976).

2^1490909 is an apocalyptic number.

It is an amenable number.

1490909 is a deficient number, since it is larger than the sum of its proper divisors (212995).

1490909 is an equidigital number, since it uses as much as digits as its factorization.

1490909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212994.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1490909 is about 1221.0278457103. The cubic root of 1490909 is about 114.2396977688.

Adding to 1490909 its sum of digits (32), we get a palindrome (1490941).

The spelling of 1490909 in words is "one million, four hundred ninety thousand, nine hundred nine".