26422421 has 2 divisors, whose sum is σ = 26422422. Its totient is φ = 26422420.

The previous prime is 26422399. The next prime is 26422453. The reversal of 26422421 is 12422462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25867396 + 555025 = 5086^2 + 745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26422421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26422481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13211210 + 13211211.

It is an arithmetic number, because the mean of its divisors is an integer number (13211211).

Almost surely, 2^26422421 is an apocalyptic number.

It is an amenable number.

26422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26422421 is an equidigital number, since it uses as much as digits as its factorization.

26422421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 23.

The square root of 26422421 is about 5140.2744090175. The cubic root of 26422421 is about 297.8453809543.

Adding to 26422421 its reverse (12422462), we get a palindrome (38844883).

The spelling of 26422421 in words is "twenty-six million, four hundred twenty-two thousand, four hundred twenty-one".