26942721 has 8 divisors (see below), whose sum is σ = 38687040. Its totient is φ = 16580112.

The previous prime is 26942717. The next prime is 26942723. The reversal of 26942721 is 12724962.

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

It is not a de Polignac number, because 26942721 - 2² = 26942717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26942723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345381 + ... + 345458.

It is an arithmetic number, because the mean of its divisors is an integer number (4835880).

Almost surely, 2^26942721 is an apocalyptic number.

It is an amenable number.

26942721 is a deficient number, since it is larger than the sum of its proper divisors (11744319).

26942721 is a wasteful number, since it uses less digits than its factorization.

26942721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690855.

The product of its digits is 12096, while the sum is 33.

The square root of 26942721 is about 5190.6378220793. The cubic root of 26942721 is about 299.7877053609.

The spelling of 26942721 in words is "twenty-six million, nine hundred forty-two thousand, seven hundred twenty-one".