26720242 has 4 divisors (see below), whose sum is σ = 40080366. Its totient is φ = 13360120.

The previous prime is 26720237. The next prime is 26720303. The reversal of 26720242 is 24202762.

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

It can be written as a sum of positive squares in only one way, i.e., 26718561 + 1681 = 5169^2 + 41^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6680059 + ... + 6680062.

Almost surely, 2^26720242 is an apocalyptic number.

26720242 is a deficient number, since it is larger than the sum of its proper divisors (13360124).

26720242 is a wasteful number, since it uses less digits than its factorization.

26720242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13360123.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 26720242 is about 5169.1626014278. The cubic root of 26720242 is about 298.9602598906.

It can be divided in two parts, 26720 and 242, that added together give a palindrome (26962).

The spelling of 26720242 in words is "twenty-six million, seven hundred twenty thousand, two hundred forty-two".