26587561 has 16 divisors (see below), whose sum is σ = 35699328. Its totient is φ = 19123200.

The previous prime is 26587559. The next prime is 26587573. The reversal of 26587561 is 16578562.

It is a cyclic number.

It is not a de Polignac number, because 26587561 - 2¹ = 26587559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26587501) 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 15 ways as a sum of consecutive naturals, for example, 12280 + ... + 14281.

It is an arithmetic number, because the mean of its divisors is an integer number (2231208).

Almost surely, 2^26587561 is an apocalyptic number.

It is an amenable number.

26587561 is a deficient number, since it is larger than the sum of its proper divisors (9111767).

26587561 is a wasteful number, since it uses less digits than its factorization.

26587561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26592.

The product of its digits is 100800, while the sum is 40.

The square root of 26587561 is about 5156.3127329517. The cubic root of 26587561 is about 298.4646034118.

The spelling of 26587561 in words is "twenty-six million, five hundred eighty-seven thousand, five hundred sixty-one".