26497861 has 4 divisors (see below), whose sum is σ = 28536172. Its totient is φ = 24459552.

The previous prime is 26497853. The next prime is 26497873. The reversal of 26497861 is 16879462.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13645636 + 12852225 = 3694^2 + 3585^2 .

It is not a de Polignac number, because 26497861 - 2³ = 26497853 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 (26497811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019136 + ... + 1019161.

It is an arithmetic number, because the mean of its divisors is an integer number (7134043).

Almost surely, 2^26497861 is an apocalyptic number.

It is an amenable number.

26497861 is a deficient number, since it is larger than the sum of its proper divisors (2038311).

26497861 is a wasteful number, since it uses less digits than its factorization.

26497861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038310.

The product of its digits is 145152, while the sum is 43.

The square root of 26497861 is about 5147.6073082550. The cubic root of 26497861 is about 298.1285761093.

The spelling of 26497861 in words is "twenty-six million, four hundred ninety-seven thousand, eight hundred sixty-one".