105512345 has 16 divisors (see below), whose sum is σ = 130872000. Its totient is φ = 81601344.

The previous prime is 105512299. The next prime is 105512357. The reversal of 105512345 is 543215501.

It is a cyclic number.

It is not a de Polignac number, because 105512345 - 2²⁶ = 38403481 is a prime.

It is a super-2 number, since 2×105512345² = 22265709894798050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28406 + ... + 31904.

It is an arithmetic number, because the mean of its divisors is an integer number (8179500).

Almost surely, 2^105512345 is an apocalyptic number.

It is an amenable number.

105512345 is a deficient number, since it is larger than the sum of its proper divisors (25359655).

105512345 is a wasteful number, since it uses less digits than its factorization.

105512345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 105512345 is about 10271.9202197058. The cubic root of 105512345 is about 472.5354825308.

Adding to 105512345 its reverse (543215501), we get a palindrome (648727846).

It can be divided in two parts, 10551 and 2345, that multiplied together give a triangular number (24742095 = T₇₀₃₄).

The spelling of 105512345 in words is "one hundred five million, five hundred twelve thousand, three hundred forty-five".