26431427 has 4 divisors (see below), whose sum is σ = 28834296. Its totient is φ = 24028560.

The previous prime is 26431423. The next prime is 26431453. The reversal of 26431427 is 72413462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26431427 - 2² = 26431423 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 26431427.

It is not an unprimeable number, because it can be changed into a prime (26431423) 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, 1201418 + ... + 1201439.

It is an arithmetic number, because the mean of its divisors is an integer number (7208574).

Almost surely, 2^26431427 is an apocalyptic number.

26431427 is a deficient number, since it is larger than the sum of its proper divisors (2402869).

26431427 is a wasteful number, since it uses less digits than its factorization.

26431427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402868.

The product of its digits is 8064, while the sum is 29.

The square root of 26431427 is about 5141.1503576534. The cubic root of 26431427 is about 297.8792170008.

Adding to 26431427 its reverse (72413462), we get a palindrome (98844889).

The spelling of 26431427 in words is "twenty-six million, four hundred thirty-one thousand, four hundred twenty-seven".