26121157 has 4 divisors (see below), whose sum is σ = 26133280. Its totient is φ = 26109036.

The previous prime is 26121133. The next prime is 26121187. The reversal of 26121157 is 75112162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26121157 - 2²³ = 17732549 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 (26121107) 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 in 3 ways as a sum of consecutive naturals, for example, 1857 + ... + 7462.

It is an arithmetic number, because the mean of its divisors is an integer number (6533320).

Almost surely, 2^26121157 is an apocalyptic number.

It is an amenable number.

26121157 is a deficient number, since it is larger than the sum of its proper divisors (12123).

26121157 is an equidigital number, since it uses as much as digits as its factorization.

26121157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122.

The product of its digits is 840, while the sum is 25.

The square root of 26121157 is about 5110.8861266908. The cubic root of 26121157 is about 296.7090569117.

The spelling of 26121157 in words is "twenty-six million, one hundred twenty-one thousand, one hundred fifty-seven".