26090642 has 4 divisors (see below), whose sum is σ = 39135966. Its totient is φ = 13045320.

The previous prime is 26090611. The next prime is 26090663. The reversal of 26090642 is 24609062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24609062 = 2 ⋅12304531.

It can be written as a sum of positive squares in only one way, i.e., 25897921 + 192721 = 5089^2 + 439^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6522659 + ... + 6522662.

Almost surely, 2^26090642 is an apocalyptic number.

26090642 is a deficient number, since it is larger than the sum of its proper divisors (13045324).

26090642 is a wasteful number, since it uses less digits than its factorization.

26090642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13045323.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 26090642 is about 5107.8999598661. The cubic root of 26090642 is about 296.5934723831.

The spelling of 26090642 in words is "twenty-six million, ninety thousand, six hundred forty-two".