16421145 has 16 divisors (see below), whose sum is σ = 28295232. Its totient is φ = 8084160.

The previous prime is 16421129. The next prime is 16421147. The reversal of 16421145 is 54112461.

It is a happy number.

16421145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16421145 - 2⁴ = 16421129 is a prime.

It is a super-2 number, since 2×16421145² = 539308006222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16421147) 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, 41911 + ... + 42300.

It is an arithmetic number, because the mean of its divisors is an integer number (1768452).

Almost surely, 2^16421145 is an apocalyptic number.

16421145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16421145 is a deficient number, since it is larger than the sum of its proper divisors (11874087).

16421145 is a wasteful number, since it uses less digits than its factorization.

16421145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84232.

The product of its digits is 960, while the sum is 24.

The square root of 16421145 is about 4052.3011980849. The cubic root of 16421145 is about 254.1759635884.

The spelling of 16421145 in words is "sixteen million, four hundred twenty-one thousand, one hundred forty-five".