16275121 has 4 divisors (see below), whose sum is σ = 16384500. Its totient is φ = 16165744.

The previous prime is 16275101. The next prime is 16275139. The reversal of 16275121 is 12157261.

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 7507600 + 8767521 = 2740^2 + 2961^2 .

It is a cyclic number.

It is not a de Polignac number, because 16275121 - 2⁵ = 16275089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16275101) 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, 54466 + ... + 54763.

It is an arithmetic number, because the mean of its divisors is an integer number (4096125).

Almost surely, 2^16275121 is an apocalyptic number.

It is an amenable number.

16275121 is a deficient number, since it is larger than the sum of its proper divisors (109379).

16275121 is a wasteful number, since it uses less digits than its factorization.

16275121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109378.

The product of its digits is 840, while the sum is 25.

The square root of 16275121 is about 4034.2435474324. The cubic root of 16275121 is about 253.4203046646.

The spelling of 16275121 in words is "sixteen million, two hundred seventy-five thousand, one hundred twenty-one".