105645431 has 4 divisors (see below), whose sum is σ = 105666600. Its totient is φ = 105624264.

The previous prime is 105645383. The next prime is 105645437. The reversal of 105645431 is 134546501.

It is a happy number.

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 105645431 - 2¹⁴ = 105629047 is a prime.

It is a super-2 number, since 2×105645431² = 22321914182351522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105645394 and 105645403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105645437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505 + ... + 14613.

It is an arithmetic number, because the mean of its divisors is an integer number (26416650).

Almost surely, 2^105645431 is an apocalyptic number.

105645431 is a deficient number, since it is larger than the sum of its proper divisors (21169).

105645431 is an equidigital number, since it uses as much as digits as its factorization.

105645431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21168.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 105645431 is about 10278.3963243300. The cubic root of 105645431 is about 472.7340736212.

The spelling of 105645431 in words is "one hundred five million, six hundred forty-five thousand, four hundred thirty-one".