26630251 has 4 divisors (see below), whose sum is σ = 27788112. Its totient is φ = 25472392.

The previous prime is 26630243. The next prime is 26630257. The reversal of 26630251 is 15203662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26630251 - 2³ = 26630243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26630257) 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 3 ways as a sum of consecutive naturals, for example, 578896 + ... + 578941.

It is an arithmetic number, because the mean of its divisors is an integer number (6947028).

Almost surely, 2^26630251 is an apocalyptic number.

26630251 is a deficient number, since it is larger than the sum of its proper divisors (1157861).

26630251 is a wasteful number, since it uses less digits than its factorization.

26630251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157860.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 26630251 is about 5160.4506586150. The cubic root of 26630251 is about 298.6242600348.

The spelling of 26630251 in words is "twenty-six million, six hundred thirty thousand, two hundred fifty-one".