26252021 has 8 divisors (see below), whose sum is σ = 26952888. Its totient is φ = 25560000.

The previous prime is 26252011. The next prime is 26252027. The reversal of 26252021 is 12025262.

It can be written as a sum of positive squares in 4 ways, for example, as 10491121 + 15760900 = 3239^2 + 3970^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26252021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26251984 and 26252002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26252027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4031 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (3369111).

Almost surely, 2^26252021 is an apocalyptic number.

It is an amenable number.

26252021 is a deficient number, since it is larger than the sum of its proper divisors (700867).

26252021 is a wasteful number, since it uses less digits than its factorization.

26252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 26252021 is about 5123.6726085885. The cubic root of 26252021 is about 297.2037245321.

Adding to 26252021 its reverse (12025262), we get a palindrome (38277283).

The spelling of 26252021 in words is "twenty-six million, two hundred fifty-two thousand, twenty-one".