16421351 has 8 divisors (see below), whose sum is σ = 17006208. Its totient is φ = 15840000.

The previous prime is 16421347. The next prime is 16421357. The reversal of 16421351 is 15312461.

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 16421351 - 2² = 16421347 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 (16421357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11771 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (2125776).

Almost surely, 2^16421351 is an apocalyptic number.

16421351 is a deficient number, since it is larger than the sum of its proper divisors (584857).

16421351 is a wasteful number, since it uses less digits than its factorization.

16421351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753.

The product of its digits is 720, while the sum is 23.

The square root of 16421351 is about 4052.3266156617. The cubic root of 16421351 is about 254.1770264463.

The spelling of 16421351 in words is "sixteen million, four hundred twenty-one thousand, three hundred fifty-one".