10266591 has 4 divisors (see below), whose sum is σ = 13688792. Its totient is φ = 6844392.

The previous prime is 10266587. The next prime is 10266617. The reversal of 10266591 is 19566201.

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

It is not a de Polignac number, because 10266591 - 2² = 10266587 is a prime.

It is a super-2 number, since 2×10266591² = 210805781522562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10266511) 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, 1711096 + ... + 1711101.

It is an arithmetic number, because the mean of its divisors is an integer number (3422198).

Almost surely, 2^10266591 is an apocalyptic number.

10266591 is a deficient number, since it is larger than the sum of its proper divisors (3422201).

10266591 is an equidigital number, since it uses as much as digits as its factorization.

10266591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422200.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 10266591 is about 3204.1521499454. The cubic root of 10266591 is about 217.3412132108.

The spelling of 10266591 in words is "ten million, two hundred sixty-six thousand, five hundred ninety-one".