16504157 has 2 divisors, whose sum is σ = 16504158. Its totient is φ = 16504156.

The previous prime is 16504151. The next prime is 16504207. The reversal of 16504157 is 75140561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14295961 + 2208196 = 3781^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 16504157 - 2¹² = 16500061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16504151) by changing a digit.

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 as a sum of consecutive naturals, namely, 8252078 + 8252079.

It is an arithmetic number, because the mean of its divisors is an integer number (8252079).

Almost surely, 2^16504157 is an apocalyptic number.

It is an amenable number.

16504157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504157 is an equidigital number, since it uses as much as digits as its factorization.

16504157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 16504157 is about 4062.5308614212. The cubic root of 16504157 is about 254.6035464468.

It can be divided in two parts, 16504 and 157, that added together give a palindrome (16661).

The spelling of 16504157 in words is "sixteen million, five hundred four thousand, one hundred fifty-seven".