26921961 has 12 divisors (see below), whose sum is σ = 42422640. Its totient is φ = 16316280.

The previous prime is 26921959. The next prime is 26921987. The reversal of 26921961 is 16912962.

It is not a de Polignac number, because 26921961 - 2¹ = 26921959 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (26921161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135871 + ... + 136068.

It is an arithmetic number, because the mean of its divisors is an integer number (3535220).

Almost surely, 2^26921961 is an apocalyptic number.

It is an amenable number.

26921961 is a deficient number, since it is larger than the sum of its proper divisors (15500679).

26921961 is a wasteful number, since it uses less digits than its factorization.

26921961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271956 (or 271953 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 26921961 is about 5188.6376824750. The cubic root of 26921961 is about 299.7106877511.

The spelling of 26921961 in words is "twenty-six million, nine hundred twenty-one thousand, nine hundred sixty-one".