26247421 has 16 divisors (see below), whose sum is σ = 28159488. Its totient is φ = 24422400.

The previous prime is 26247413. The next prime is 26247433. The reversal of 26247421 is 12474262.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26247421 - 2³ = 26247413 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 26247421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26247491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135901 + ... + 136093.

It is an arithmetic number, because the mean of its divisors is an integer number (1759968).

Almost surely, 2^26247421 is an apocalyptic number.

It is an amenable number.

26247421 is a deficient number, since it is larger than the sum of its proper divisors (1912067).

26247421 is a wasteful number, since it uses less digits than its factorization.

26247421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372.

The product of its digits is 5376, while the sum is 28.

The square root of 26247421 is about 5123.2236921688. The cubic root of 26247421 is about 297.1863643831.

The spelling of 26247421 in words is "twenty-six million, two hundred forty-seven thousand, four hundred twenty-one".