26240591 has 4 divisors (see below), whose sum is σ = 28259112. Its totient is φ = 24222072.

The previous prime is 26240579. The next prime is 26240603. The reversal of 26240591 is 19504262.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (26240579) and next prime (26240603).

It is a cyclic number.

It is not a de Polignac number, because 26240591 - 2²² = 22046287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26240491) 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, 1009241 + ... + 1009266.

It is an arithmetic number, because the mean of its divisors is an integer number (7064778).

Almost surely, 2^26240591 is an apocalyptic number.

26240591 is a deficient number, since it is larger than the sum of its proper divisors (2018521).

26240591 is a wasteful number, since it uses less digits than its factorization.

26240591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018520.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 26240591 is about 5122.5570763048. The cubic root of 26240591 is about 297.1605845937.

The spelling of 26240591 in words is "twenty-six million, two hundred forty thousand, five hundred ninety-one".