105421505 has 32 divisors (see below), whose sum is σ = 156017664. Its totient is φ = 66733056.

The previous prime is 105421501. The next prime is 105421531. The reversal of 105421505 is 505124501.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 105421505 - 2² = 105421501 is a prime.

It is a super-2 number, since 2×105421505² = 22227387432930050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105421501) 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 31 ways as a sum of consecutive naturals, for example, 29864 + ... + 33206.

It is an arithmetic number, because the mean of its divisors is an integer number (4875552).

Almost surely, 2^105421505 is an apocalyptic number.

It is an amenable number.

105421505 is a deficient number, since it is larger than the sum of its proper divisors (50596159).

105421505 is a wasteful number, since it uses less digits than its factorization.

105421505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 105421505 is about 10267.4975042607. The cubic root of 105421505 is about 472.3998350613.

The spelling of 105421505 in words is "one hundred five million, four hundred twenty-one thousand, five hundred five".