26450021 has 12 divisors (see below), whose sum is σ = 29191428. Its totient is φ = 23946624.

The previous prime is 26450009. The next prime is 26450041. The reversal of 26450021 is 12005462.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 297025 + 26152996 = 545^2 + 5114^2 .

It is not a de Polignac number, because 26450021 - 2¹⁰ = 26448997 is a prime.

It is a super-2 number, since 2×26450021² = 1399207221800882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26449975 and 26450002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26450041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7481 + ... + 10433.

It is an arithmetic number, because the mean of its divisors is an integer number (2432619).

Almost surely, 2^26450021 is an apocalyptic number.

It is an amenable number.

26450021 is a deficient number, since it is larger than the sum of its proper divisors (2741407).

26450021 is a wasteful number, since it uses less digits than its factorization.

26450021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032 (or 3019 counting only the distinct ones).

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

The square root of 26450021 is about 5142.9583898764. The cubic root of 26450021 is about 297.9490513923.

Adding to 26450021 its reverse (12005462), we get a palindrome (38455483).

The spelling of 26450021 in words is "twenty-six million, four hundred fifty thousand, twenty-one".