26691242 has 4 divisors (see below), whose sum is σ = 40036866. Its totient is φ = 13345620.

The previous prime is 26691239. The next prime is 26691283. The reversal of 26691242 is 24219662.

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., 23804641 + 2886601 = 4879^2 + 1699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26691199 and 26691208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6672809 + ... + 6672812.

Almost surely, 2^26691242 is an apocalyptic number.

26691242 is a deficient number, since it is larger than the sum of its proper divisors (13345624).

26691242 is a wasteful number, since it uses less digits than its factorization.

26691242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13345623.

The product of its digits is 10368, while the sum is 32.

The square root of 26691242 is about 5166.3567433928. The cubic root of 26691242 is about 298.8520649381.

The spelling of 26691242 in words is "twenty-six million, six hundred ninety-one thousand, two hundred forty-two".