26201257 has 4 divisors (see below), whose sum is σ = 26213760. Its totient is φ = 26188756.

The previous prime is 26201237. The next prime is 26201261. The reversal of 26201257 is 75210262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75210262 = 2 ⋅37605131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26201257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26201207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2257 + ... + 7582.

It is an arithmetic number, because the mean of its divisors is an integer number (6553440).

Almost surely, 2^26201257 is an apocalyptic number.

It is an amenable number.

26201257 is a deficient number, since it is larger than the sum of its proper divisors (12503).

26201257 is an equidigital number, since it uses as much as digits as its factorization.

26201257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12502.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 26201257 is about 5118.7163429907. The cubic root of 26201257 is about 297.0120315426.

The spelling of 26201257 in words is "twenty-six million, two hundred one thousand, two hundred fifty-seven".