15682045 has 4 divisors (see below), whose sum is σ = 18818460. Its totient is φ = 12545632.

The previous prime is 15682019. The next prime is 15682061. The reversal of 15682045 is 54028651.

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 11042329 + 4639716 = 3323^2 + 2154^2 .

It is a cyclic number.

It is not a de Polignac number, because 15682045 - 2¹⁷ = 15550973 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 15681998 and 15682016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1568200 + ... + 1568209.

It is an arithmetic number, because the mean of its divisors is an integer number (4704615).

Almost surely, 2^15682045 is an apocalyptic number.

It is an amenable number.

15682045 is a deficient number, since it is larger than the sum of its proper divisors (3136415).

15682045 is an equidigital number, since it uses as much as digits as its factorization.

15682045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136414.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 15682045 is about 3960.0561864701. The cubic root of 15682045 is about 250.3038705012.

The spelling of 15682045 in words is "fifteen million, six hundred eighty-two thousand, forty-five".