16122521 has 8 divisors (see below), whose sum is σ = 16726080. Its totient is φ = 15522192.

The previous prime is 16122497. The next prime is 16122539. The reversal of 16122521 is 12522161.

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

It is a de Polignac number, because none of the positive numbers 2^k-16122521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16122493 and 16122502.

It is not an unprimeable number, because it can be changed into a prime (16122541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14636 + ... + 15698.

It is an arithmetic number, because the mean of its divisors is an integer number (2090760).

Almost surely, 2^16122521 is an apocalyptic number.

It is an amenable number.

16122521 is a deficient number, since it is larger than the sum of its proper divisors (603559).

16122521 is a wasteful number, since it uses less digits than its factorization.

16122521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615.

The product of its digits is 240, while the sum is 20.

The square root of 16122521 is about 4015.2859175904. The cubic root of 16122521 is about 252.6257701051.

Adding to 16122521 its reverse (12522161), we get a palindrome (28644682).

The spelling of 16122521 in words is "sixteen million, one hundred twenty-two thousand, five hundred twenty-one".