16421130 has 160 divisors (see below), whose sum is σ = 51226560. Its totient is φ = 3732480.

The previous prime is 16421129. The next prime is 16421147. The reversal of 16421130 is 3112461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 169242 + ... + 169338.

It is an arithmetic number, because the mean of its divisors is an integer number (320166).

Almost surely, 2^16421130 is an apocalyptic number.

16421130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16421130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25613280).

16421130 is an abundant number, since it is smaller than the sum of its proper divisors (34805430).

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

16421130 is a wasteful number, since it uses less digits than its factorization.

16421130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16421130 is about 4052.2993472842. The cubic root of 16421130 is about 254.1758861955.

Adding to 16421130 its reverse (3112461), we get a palindrome (19533591).

It can be divided in two parts, 1642 and 1130, that added together give a palindrome (2772).

The spelling of 16421130 in words is "sixteen million, four hundred twenty-one thousand, one hundred thirty".