105247081 has 3 divisors (see below), whose sum is σ = 105257341. Its totient is φ = 105236822.

The previous prime is 105247073. The next prime is 105247117. The reversal of 105247081 is 180742501.

The square root of 105247081 is 10259.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 180742501 = 491 ⋅368111.

It is not a de Polignac number, because 105247081 - 2³ = 105247073 is a prime.

It is a super-2 number, since 2×105247081² = 22153896118041122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105247001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5130 + ... + 15388.

Almost surely, 2^105247081 is an apocalyptic number.

105247081 is the 10259-th square number.

105247081 is the 5130-th centered octagonal number.

It is an amenable number.

105247081 is a deficient number, since it is larger than the sum of its proper divisors (10260).

105247081 is an frugal number, since it uses more digits than its factorization.

105247081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20518 (or 10259 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The cubic root of 105247081 is about 472.1391565778.

Adding to 105247081 its reverse (180742501), we get a palindrome (285989582).

The spelling of 105247081 in words is "one hundred five million, two hundred forty-seven thousand, eighty-one".