26436421 has 4 divisors (see below), whose sum is σ = 28839744. Its totient is φ = 24033100.

The previous prime is 26436367. The next prime is 26436433. The reversal of 26436421 is 12463462.

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.

It is a cyclic number.

It is not a de Polignac number, because 26436421 - 2⁹ = 26435909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26436421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26436451) 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, 1201645 + ... + 1201666.

It is an arithmetic number, because the mean of its divisors is an integer number (7209936).

Almost surely, 2^26436421 is an apocalyptic number.

It is an amenable number.

26436421 is a deficient number, since it is larger than the sum of its proper divisors (2403323).

26436421 is a wasteful number, since it uses less digits than its factorization.

26436421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403322.

The product of its digits is 6912, while the sum is 28.

The square root of 26436421 is about 5141.6360236796. The cubic root of 26436421 is about 297.8979764259.

Adding to 26436421 its reverse (12463462), we get a palindrome (38899883).

The spelling of 26436421 in words is "twenty-six million, four hundred thirty-six thousand, four hundred twenty-one".