16421454 has 56 divisors (see below), whose sum is σ = 42233520. Its totient is φ = 4688928.

The previous prime is 16421437. The next prime is 16421459. The reversal of 16421454 is 45412461.

16421454 is a `hidden beast` number, since 1 + 642 + 14 + 5 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 9402 + ... + 11010.

It is an arithmetic number, because the mean of its divisors is an integer number (754170).

Almost surely, 2^16421454 is an apocalyptic number.

16421454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16421454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21116760).

16421454 is an abundant number, since it is smaller than the sum of its proper divisors (25812066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16421454 is an equidigital number, since it uses as much as digits as its factorization.

16421454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1621 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 16421454 is about 4052.3393243903. The cubic root of 16421454 is about 254.1775578719.

The spelling of 16421454 in words is "sixteen million, four hundred twenty-one thousand, four hundred fifty-four".