105421290 has 32 divisors (see below), whose sum is σ = 272474496. Its totient is φ = 25949760.

The previous prime is 105421289. The next prime is 105421319. The reversal of 105421290 is 92124501.

It is a super-2 number, since 2×105421290² = 22227296770528200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 105421290.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 134766 + ... + 135545.

It is an arithmetic number, because the mean of its divisors is an integer number (8514828).

Almost surely, 2^105421290 is an apocalyptic number.

105421290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105421290 is an abundant number, since it is smaller than the sum of its proper divisors (167053206).

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

105421290 is a wasteful number, since it uses less digits than its factorization.

105421290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270334.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 105421290 is about 10267.4870343234. The cubic root of 105421290 is about 472.3995139186.

Adding to 105421290 its reverse (92124501), we get a palindrome (197545791).

The spelling of 105421290 in words is "one hundred five million, four hundred twenty-one thousand, two hundred ninety".