105421250 has 120 divisors (see below), whose sum is σ = 235583964. Its totient is φ = 35200000.

The previous prime is 105421223. The next prime is 105421273. The reversal of 105421250 is 52124501.

It can be written as a sum of positive squares in 10 ways, for example, as 17380561 + 88040689 = 4169^2 + 9383^2 .

It is a super-2 number, since 2×105421250² = 22227279903125000, which contains 22 as substring.

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 59 ways as a sum of consecutive naturals, for example, 2571230 + ... + 2571270.

Almost surely, 2^105421250 is an apocalyptic number.

105421250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105421250 is an abundant number, since it is smaller than the sum of its proper divisors (130162714).

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

105421250 is a wasteful number, since it uses less digits than its factorization.

105421250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 105421250 is about 10267.4850864270. The cubic root of 105421250 is about 472.3994541711.

Adding to 105421250 its reverse (52124501), we get a palindrome (157545751).

The spelling of 105421250 in words is "one hundred five million, four hundred twenty-one thousand, two hundred fifty".