1438491 has 4 divisors (see below), whose sum is σ = 1917992. Its totient is φ = 958992.

The previous prime is 1438483. The next prime is 1438501. The reversal of 1438491 is 1948341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1438491 - 2³ = 1438483 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438291) 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 in 3 ways as a sum of consecutive naturals, for example, 239746 + ... + 239751.

It is an arithmetic number, because the mean of its divisors is an integer number (479498).

2^1438491 is an apocalyptic number.

1438491 is a deficient number, since it is larger than the sum of its proper divisors (479501).

1438491 is an equidigital number, since it uses as much as digits as its factorization.

1438491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479500.

The product of its digits is 3456, while the sum is 30.

The square root of 1438491 is about 1199.3710851942. The cubic root of 1438491 is about 112.8848645858.

The spelling of 1438491 in words is "one million, four hundred thirty-eight thousand, four hundred ninety-one".