26986421 has 16 divisors (see below), whose sum is σ = 34113408. Its totient is φ = 20736000.

The previous prime is 26986417. The next prime is 26986447. The reversal of 26986421 is 12468962.

It is a cyclic number.

It is not a de Polignac number, because 26986421 - 2² = 26986417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26986411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3221 + ... + 8021.

It is an arithmetic number, because the mean of its divisors is an integer number (2132088).

Almost surely, 2^26986421 is an apocalyptic number.

It is an amenable number.

26986421 is a deficient number, since it is larger than the sum of its proper divisors (7126987).

26986421 is a wasteful number, since it uses less digits than its factorization.

26986421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4892.

The product of its digits is 41472, while the sum is 38.

The square root of 26986421 is about 5194.8456184953. The cubic root of 26986421 is about 299.9496989739.

It can be divided in two parts, 2698 and 6421, that added together give a palindrome (9119).

The spelling of 26986421 in words is "twenty-six million, nine hundred eighty-six thousand, four hundred twenty-one".