108981265 has 4 divisors (see below), whose sum is σ = 130777524. Its totient is φ = 87185008.

The previous prime is 108981263. The next prime is 108981269. The reversal of 108981265 is 562189801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562189801 = 181 ⋅3106021.

It can be written as a sum of positive squares in 2 ways, for example, as 44997264 + 63984001 = 6708^2 + 7999^2 .

It is a cyclic number.

It is not a de Polignac number, because 108981265 - 2¹ = 108981263 is a prime.

It is a super-2 number, since 2×108981265² = 23753832242000450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108981263) 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, 10898122 + ... + 10898131.

It is an arithmetic number, because the mean of its divisors is an integer number (32694381).

Almost surely, 2^108981265 is an apocalyptic number.

It is an amenable number.

108981265 is a deficient number, since it is larger than the sum of its proper divisors (21796259).

108981265 is an equidigital number, since it uses as much as digits as its factorization.

108981265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21796258.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 108981265 is about 10439.4092265798. The cubic root of 108981265 is about 477.6582482171.

The spelling of 108981265 in words is "one hundred eight million, nine hundred eighty-one thousand, two hundred sixty-five".