16293121 has 12 divisors (see below), whose sum is σ = 17761980. Its totient is φ = 14938560.

The previous prime is 16293103. The next prime is 16293133. The reversal of 16293121 is 12139261.

It can be written as a sum of positive squares in 6 ways, for example, as 3591025 + 12702096 = 1895^2 + 3564^2 .

It is not a de Polignac number, because 16293121 - 2⁹ = 16292609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16293521) 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 11 ways as a sum of consecutive naturals, for example, 38491 + ... + 38911.

It is an arithmetic number, because the mean of its divisors is an integer number (1480165).

Almost surely, 2^16293121 is an apocalyptic number.

It is an amenable number.

16293121 is a deficient number, since it is larger than the sum of its proper divisors (1468859).

16293121 is a wasteful number, since it uses less digits than its factorization.

16293121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 663 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

The square root of 16293121 is about 4036.4738324434. The cubic root of 16293121 is about 253.5136963891.

The spelling of 16293121 in words is "sixteen million, two hundred ninety-three thousand, one hundred twenty-one".