16139265 has 16 divisors (see below), whose sum is σ = 27182400. Its totient is φ = 8154432.

The previous prime is 16139243. The next prime is 16139269. The reversal of 16139265 is 56293161.

It is a happy number.

It is not a de Polignac number, because 16139265 - 2⁹ = 16138753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16139269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28030 + ... + 28599.

It is an arithmetic number, because the mean of its divisors is an integer number (1698900).

Almost surely, 2^16139265 is an apocalyptic number.

16139265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16139265 is a deficient number, since it is larger than the sum of its proper divisors (11043135).

16139265 is a wasteful number, since it uses less digits than its factorization.

16139265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56656.

The product of its digits is 9720, while the sum is 33.

The square root of 16139265 is about 4017.3704086131. The cubic root of 16139265 is about 252.7131944477.

It can be divided in two parts, 1613 and 9265, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 16139265 in words is "sixteen million, one hundred thirty-nine thousand, two hundred sixty-five".