16081257 has 4 divisors (see below), whose sum is σ = 21441680. Its totient is φ = 10720836.

The previous prime is 16081237. The next prime is 16081259. The reversal of 16081257 is 75218061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16081257 - 2⁶ = 16081193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16081259) 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, 2680207 + ... + 2680212.

It is an arithmetic number, because the mean of its divisors is an integer number (5360420).

Almost surely, 2^16081257 is an apocalyptic number.

It is an amenable number.

16081257 is a deficient number, since it is larger than the sum of its proper divisors (5360423).

16081257 is an equidigital number, since it uses as much as digits as its factorization.

16081257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360422.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 16081257 is about 4010.1442617442. The cubic root of 16081257 is about 252.4100624043.

The spelling of 16081257 in words is "sixteen million, eighty-one thousand, two hundred fifty-seven".