26172945 has 24 divisors (see below), whose sum is σ = 48036456. Its totient is φ = 13137408.

The previous prime is 26172941. The next prime is 26172953. The reversal of 26172945 is 54927162.

It can be written as a sum of positive squares in 4 ways, for example, as 10419984 + 15752961 = 3228^2 + 3969^2 .

It is not a de Polignac number, because 26172945 - 2² = 26172941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26172941) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 16342 + ... + 17871.

It is an arithmetic number, because the mean of its divisors is an integer number (2001519).

Almost surely, 2^26172945 is an apocalyptic number.

It is an amenable number.

26172945 is a deficient number, since it is larger than the sum of its proper divisors (21863511).

26172945 is a wasteful number, since it uses less digits than its factorization.

26172945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34241 (or 34238 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 26172945 is about 5115.9500583958. The cubic root of 26172945 is about 296.9050133276.

The spelling of 26172945 in words is "twenty-six million, one hundred seventy-two thousand, nine hundred forty-five".