106521043 has 4 divisors (see below), whose sum is σ = 108530928. Its totient is φ = 104511160.

The previous prime is 106521017. The next prime is 106521047. The reversal of 106521043 is 340125601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 106521043 - 2¹⁷ = 106389971 is a prime.

It is a super-2 number, since 2×106521043² = 22693465203615698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106521047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004863 + ... + 1004968.

It is an arithmetic number, because the mean of its divisors is an integer number (27132732).

Almost surely, 2^106521043 is an apocalyptic number.

106521043 is a deficient number, since it is larger than the sum of its proper divisors (2009885).

106521043 is an equidigital number, since it uses as much as digits as its factorization.

106521043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009884.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 106521043 is about 10320.9032065997. The cubic root of 106521043 is about 474.0365223747.

Adding to 106521043 its reverse (340125601), we get a palindrome (446646644).

The spelling of 106521043 in words is "one hundred six million, five hundred twenty-one thousand, forty-three".