105421450 has 12 divisors (see below), whose sum is σ = 196083990. Its totient is φ = 42168560.

The previous prime is 105421447. The next prime is 105421451. The reversal of 105421450 is 54124501.

It can be written as a sum of positive squares in 3 ways, for example, as 101465329 + 3956121 = 10073^2 + 1989^2 .

It is a super-2 number, since 2×105421450² = 22227364240205000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105421451) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1054165 + ... + 1054264.

Almost surely, 2^105421450 is an apocalyptic number.

105421450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105421450 is a deficient number, since it is larger than the sum of its proper divisors (90662540).

105421450 is a wasteful number, since it uses less digits than its factorization.

105421450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108441 (or 2108436 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 105421450 is about 10267.4948259057. The cubic root of 105421450 is about 472.3997529086.

Adding to 105421450 its reverse (54124501), we get a palindrome (159545951).

The spelling of 105421450 in words is "one hundred five million, four hundred twenty-one thousand, four hundred fifty".