105394821 has 16 divisors (see below), whose sum is σ = 164020224. Its totient is φ = 58943664.

The previous prime is 105394799. The next prime is 105394831. The reversal of 105394821 is 128493501.

It is not a de Polignac number, because 105394821 - 2⁵ = 105394789 is a prime.

It is a super-2 number, since 2×105394821² = 22216136587244082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105394831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52405 + ... + 54378.

It is an arithmetic number, because the mean of its divisors is an integer number (10251264).

Almost surely, 2^105394821 is an apocalyptic number.

It is an amenable number.

105394821 is a deficient number, since it is larger than the sum of its proper divisors (58625403).

105394821 is a wasteful number, since it uses less digits than its factorization.

105394821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106840.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 105394821 is about 10266.1979817262. The cubic root of 105394821 is about 472.3599741844.

The spelling of 105394821 in words is "one hundred five million, three hundred ninety-four thousand, eight hundred twenty-one".