26449421 has 4 divisors (see below), whose sum is σ = 27361500. Its totient is φ = 25537344.

The previous prime is 26449411. The next prime is 26449427. The reversal of 26449421 is 12494462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12494462 = 2 ⋅6247231.

It can be written as a sum of positive squares in 2 ways, for example, as 6325225 + 20124196 = 2515^2 + 4486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26449421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26449427) 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, 455996 + ... + 456053.

It is an arithmetic number, because the mean of its divisors is an integer number (6840375).

Almost surely, 2^26449421 is an apocalyptic number.

It is an amenable number.

26449421 is a deficient number, since it is larger than the sum of its proper divisors (912079).

26449421 is an equidigital number, since it uses as much as digits as its factorization.

26449421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912078.

The product of its digits is 13824, while the sum is 32.

The square root of 26449421 is about 5142.9000573606. The cubic root of 26449421 is about 297.9467984542.

The spelling of 26449421 in words is "twenty-six million, four hundred forty-nine thousand, four hundred twenty-one".