26539157 has 2 divisors, whose sum is σ = 26539158. Its totient is φ = 26539156.

The previous prime is 26539153. The next prime is 26539187. The reversal of 26539157 is 75193562.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 10491121 = 4006^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 26539157 - 2² = 26539153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26539157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26539153) by changing a digit.

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, 13269578 + 13269579.

It is an arithmetic number, because the mean of its divisors is an integer number (13269579).

Almost surely, 2^26539157 is an apocalyptic number.

It is an amenable number.

26539157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26539157 is an equidigital number, since it uses as much as digits as its factorization.

26539157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 26539157 is about 5151.6169306345. The cubic root of 26539157 is about 298.2833700820.

The spelling of 26539157 in words is "twenty-six million, five hundred thirty-nine thousand, one hundred fifty-seven".