1481509 has 4 divisors (see below), whose sum is σ = 1509516. Its totient is φ = 1453504.

The previous prime is 1481503. The next prime is 1481527. The reversal of 1481509 is 9051841.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1329409 + 152100 = 1153^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1481509 - 2⁵ = 1481477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13924 + ... + 14029.

It is an arithmetic number, because the mean of its divisors is an integer number (377379).

2^1481509 is an apocalyptic number.

It is an amenable number.

1481509 is a deficient number, since it is larger than the sum of its proper divisors (28007).

1481509 is an equidigital number, since it uses as much as digits as its factorization.

1481509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28006.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1481509 is about 1217.1725432329. The cubic root of 1481509 is about 113.9991022808. Note that the first 3 decimals are identical.

The spelling of 1481509 in words is "one million, four hundred eighty-one thousand, five hundred nine".