16121343 has 16 divisors (see below), whose sum is σ = 25068800. Its totient is φ = 9211608.

The previous prime is 16121341. The next prime is 16121363. The reversal of 16121343 is 34312161.

It is not a de Polignac number, because 16121343 - 2¹ = 16121341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6805 + ... + 8862.

It is an arithmetic number, because the mean of its divisors is an integer number (1566800).

Almost surely, 2^16121343 is an apocalyptic number.

16121343 is a deficient number, since it is larger than the sum of its proper divisors (8947457).

16121343 is an equidigital number, since it uses as much as digits as its factorization.

16121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15691 (or 15677 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 16121343 is about 4015.1392254815. The cubic root of 16121343 is about 252.6196172128.

The spelling of 16121343 in words is "sixteen million, one hundred twenty-one thousand, three hundred forty-three".