40891265 has 4 divisors (see below), whose sum is σ = 49069524. Its totient is φ = 32713008.

The previous prime is 40891261. The next prime is 40891271. The reversal of 40891265 is 56219804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 19509889 = 4624^2 + 4417^2 .

It is a cyclic number.

It is not a de Polignac number, because 40891265 - 2² = 40891261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40891261) 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, 4089122 + ... + 4089131.

It is an arithmetic number, because the mean of its divisors is an integer number (12267381).

Almost surely, 2^40891265 is an apocalyptic number.

It is an amenable number.

40891265 is a deficient number, since it is larger than the sum of its proper divisors (8178259).

40891265 is an equidigital number, since it uses as much as digits as its factorization.

40891265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8178258.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 40891265 is about 6394.6278234155. The cubic root of 40891265 is about 344.5166233483.

The spelling of 40891265 in words is "forty million, eight hundred ninety-one thousand, two hundred sixty-five".