26642257 has 8 divisors (see below), whose sum is σ = 28552896. Its totient is φ = 24794352.

The previous prime is 26642233. The next prime is 26642261. The reversal of 26642257 is 75224662.

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

It is a cyclic number.

It is not a de Polignac number, because 26642257 - 2⁷ = 26642129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26642207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14803 + ... + 16504.

It is an arithmetic number, because the mean of its divisors is an integer number (3569112).

Almost surely, 2^26642257 is an apocalyptic number.

It is an amenable number.

26642257 is a deficient number, since it is larger than the sum of its proper divisors (1910639).

26642257 is a wasteful number, since it uses less digits than its factorization.

26642257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31367.

The product of its digits is 40320, while the sum is 34.

The square root of 26642257 is about 5161.6137980287. The cubic root of 26642257 is about 298.6691306121.

The spelling of 26642257 in words is "twenty-six million, six hundred forty-two thousand, two hundred fifty-seven".