16121251 has 8 divisors (see below), whose sum is σ = 16365024. Its totient is φ = 15879360.

The previous prime is 16121249. The next prime is 16121257. The reversal of 16121251 is 15212161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16121251 - 2¹ = 16121249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16121257) 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 in 7 ways as a sum of consecutive naturals, for example, 28665 + ... + 29221.

It is an arithmetic number, because the mean of its divisors is an integer number (2045628).

Almost surely, 2^16121251 is an apocalyptic number.

16121251 is a deficient number, since it is larger than the sum of its proper divisors (243773).

16121251 is a wasteful number, since it uses less digits than its factorization.

16121251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its digits is 120, while the sum is 19.

The square root of 16121251 is about 4015.1277688263. The cubic root of 16121251 is about 252.6191366687.

It can be divided in two parts, 161 and 21251, that added together give a palindrome (21412).

The spelling of 16121251 in words is "sixteen million, one hundred twenty-one thousand, two hundred fifty-one".