15804049 has 4 divisors (see below), whose sum is σ = 15812020. Its totient is φ = 15796080.

The previous prime is 15804037. The next prime is 15804071. The reversal of 15804049 is 94040851.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94040851 = 241 ⋅390211.

It can be written as a sum of positive squares in 2 ways, for example, as 10660225 + 5143824 = 3265^2 + 2268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15804049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15804049.

It is not an unprimeable number, because it can be changed into a prime (15802049) 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, 1579 + ... + 5839.

It is an arithmetic number, because the mean of its divisors is an integer number (3953005).

Almost surely, 2^15804049 is an apocalyptic number.

It is an amenable number.

15804049 is a deficient number, since it is larger than the sum of its proper divisors (7971).

15804049 is an equidigital number, since it uses as much as digits as its factorization.

15804049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 15804049 is about 3975.4306684937. The cubic root of 15804049 is about 250.9513034951.

The spelling of 15804049 in words is "fifteen million, eight hundred four thousand, forty-nine".