105240491 has 4 divisors (see below), whose sum is σ = 105534000. Its totient is φ = 104946984.

The previous prime is 105240467. The next prime is 105240493. The reversal of 105240491 is 194042501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194042501 = 11423 ⋅16987.

It is a cyclic number.

It is not a de Polignac number, because 105240491 - 2¹⁴ = 105224107 is a prime.

It is a super-2 number, since 2×105240491² = 22151121891842162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105240491.

It is not an unprimeable number, because it can be changed into a prime (105240493) 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, 146216 + ... + 146933.

It is an arithmetic number, because the mean of its divisors is an integer number (26383500).

Almost surely, 2^105240491 is an apocalyptic number.

105240491 is a deficient number, since it is larger than the sum of its proper divisors (293509).

105240491 is an equidigital number, since it uses as much as digits as its factorization.

105240491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293508.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 105240491 is about 10258.6788135705. The cubic root of 105240491 is about 472.1293021098.

Adding to 105240491 its reverse (194042501), we get a palindrome (299282992).

The spelling of 105240491 in words is "one hundred five million, two hundred forty thousand, four hundred ninety-one".