26291945 has 8 divisors (see below), whose sum is σ = 33406344. Its totient is φ = 19796224.

The previous prime is 26291927. The next prime is 26291957. The reversal of 26291945 is 54919262.

It can be written as a sum of positive squares in 4 ways, for example, as 12845056 + 13446889 = 3584^2 + 3667^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26291945 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26291899 and 26291908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154574 + ... + 154743.

It is an arithmetic number, because the mean of its divisors is an integer number (4175793).

Almost surely, 2^26291945 is an apocalyptic number.

It is an amenable number.

26291945 is a deficient number, since it is larger than the sum of its proper divisors (7114399).

26291945 is a wasteful number, since it uses less digits than its factorization.

26291945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309339.

The product of its digits is 38880, while the sum is 38.

The square root of 26291945 is about 5127.5671619200. The cubic root of 26291945 is about 297.3543104183.

The spelling of 26291945 in words is "twenty-six million, two hundred ninety-one thousand, nine hundred forty-five".