26261021 has 4 divisors (see below), whose sum is σ = 27643200. Its totient is φ = 24878844.

The previous prime is 26260987. The next prime is 26261041. The reversal of 26261021 is 12016262.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12016262 = 2 ⋅6008131.

It is a cyclic number.

It is not a de Polignac number, because 26261021 - 2⁶ = 26260957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26260984 and 26261002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26261041) 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, 691061 + ... + 691098.

It is an arithmetic number, because the mean of its divisors is an integer number (6910800).

Almost surely, 2^26261021 is an apocalyptic number.

It is an amenable number.

26261021 is a deficient number, since it is larger than the sum of its proper divisors (1382179).

26261021 is a wasteful number, since it uses less digits than its factorization.

26261021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382178.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 26261021 is about 5124.5508095832. The cubic root of 26261021 is about 297.2376841767.

Adding to 26261021 its reverse (12016262), we get a palindrome (38277283).

The spelling of 26261021 in words is "twenty-six million, two hundred sixty-one thousand, twenty-one".