16274421 has 6 divisors (see below), whose sum is σ = 23507510. Its totient is φ = 10849608.

The previous prime is 16274399. The next prime is 16274429. The reversal of 16274421 is 12447261.

It can be written as a sum of positive squares in only one way, i.e., 13793796 + 2480625 = 3714^2 + 1575^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16274421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16274429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 904126 + ... + 904143.

Almost surely, 2^16274421 is an apocalyptic number.

It is an amenable number.

16274421 is a deficient number, since it is larger than the sum of its proper divisors (7233089).

16274421 is a wasteful number, since it uses less digits than its factorization.

16274421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808275 (or 1808272 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 16274421 is about 4034.1567892188. The cubic root of 16274421 is about 253.4166713736.

The spelling of 16274421 in words is "sixteen million, two hundred seventy-four thousand, four hundred twenty-one".