26501491 has 4 divisors (see below), whose sum is σ = 26763984. Its totient is φ = 26239000.

The previous prime is 26501413. The next prime is 26501513. The reversal of 26501491 is 19410562.

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 26501491 - 2²¹ = 24404339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26501401) 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, 131095 + ... + 131296.

It is an arithmetic number, because the mean of its divisors is an integer number (6690996).

Almost surely, 2^26501491 is an apocalyptic number.

26501491 is a deficient number, since it is larger than the sum of its proper divisors (262493).

26501491 is a wasteful number, since it uses less digits than its factorization.

26501491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262492.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 26501491 is about 5147.9598871786. The cubic root of 26501491 is about 298.1421892498.

The spelling of 26501491 in words is "twenty-six million, five hundred one thousand, four hundred ninety-one".