26745421 has 4 divisors (see below), whose sum is σ = 26915932. Its totient is φ = 26574912.

The previous prime is 26745419. The next prime is 26745427. The reversal of 26745421 is 12454762.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9853321 + 16892100 = 3139^2 + 4110^2 .

It is a cyclic number.

It is not a de Polignac number, because 26745421 - 2¹ = 26745419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26745427) 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 3 ways as a sum of consecutive naturals, for example, 85020 + ... + 85333.

It is an arithmetic number, because the mean of its divisors is an integer number (6728983).

Almost surely, 2^26745421 is an apocalyptic number.

It is an amenable number.

26745421 is a deficient number, since it is larger than the sum of its proper divisors (170511).

26745421 is a wasteful number, since it uses less digits than its factorization.

26745421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170510.

The product of its digits is 13440, while the sum is 31.

The square root of 26745421 is about 5171.5975288106. The cubic root of 26745421 is about 299.0541357517.

The spelling of 26745421 in words is "twenty-six million, seven hundred forty-five thousand, four hundred twenty-one".