26149129 has 4 divisors (see below), whose sum is σ = 26170884. Its totient is φ = 26127376.

The previous prime is 26149127. The next prime is 26149139. The reversal of 26149129 is 92194162.

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 18939904 + 7209225 = 4352^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 26149129 - 2¹ = 26149127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26149094 and 26149103.

It is not an unprimeable number, because it can be changed into a prime (26149127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8962 + ... + 11515.

It is an arithmetic number, because the mean of its divisors is an integer number (6542721).

Almost surely, 2^26149129 is an apocalyptic number.

It is an amenable number.

26149129 is a deficient number, since it is larger than the sum of its proper divisors (21755).

26149129 is a wasteful number, since it uses less digits than its factorization.

26149129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21754.

The product of its digits is 7776, while the sum is 34.

The square root of 26149129 is about 5113.6219062422. The cubic root of 26149129 is about 296.8149300290.

The spelling of 26149129 in words is "twenty-six million, one hundred forty-nine thousand, one hundred twenty-nine".