26721945 has 24 divisors (see below), whose sum is σ = 47014656. Its totient is φ = 14037408.

The previous prime is 26721899. The next prime is 26721971. The reversal of 26721945 is 54912762.

It is not a de Polignac number, because 26721945 - 2¹² = 26717849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1417 + ... + 7446.

It is an arithmetic number, because the mean of its divisors is an integer number (1958944).

Almost surely, 2^26721945 is an apocalyptic number.

It is an amenable number.

26721945 is a deficient number, since it is larger than the sum of its proper divisors (20292711).

26721945 is a wasteful number, since it uses less digits than its factorization.

26721945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8941 (or 8938 counting only the distinct ones).

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

The square root of 26721945 is about 5169.3273256779. The cubic root of 26721945 is about 298.9666111119.

The spelling of 26721945 in words is "twenty-six million, seven hundred twenty-one thousand, nine hundred forty-five".