16421055 has 32 divisors (see below), whose sum is σ = 30733824. Its totient is φ = 7330176.

The previous prime is 16421039. The next prime is 16421063. The reversal of 16421055 is 55012461.

It is not a de Polignac number, because 16421055 - 2⁴ = 16421039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2697 + ... + 6333.

It is an arithmetic number, because the mean of its divisors is an integer number (960432).

Almost surely, 2^16421055 is an apocalyptic number.

16421055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16421055 is a deficient number, since it is larger than the sum of its proper divisors (14312769).

16421055 is a wasteful number, since it uses less digits than its factorization.

16421055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 16421055 is about 4052.2900932682. The cubic root of 16421055 is about 254.1754992302.

The spelling of 16421055 in words is "sixteen million, four hundred twenty-one thousand, fifty-five".