26415139 has 4 divisors (see below), whose sum is σ = 26549424. Its totient is φ = 26280856.

The previous prime is 26415133. The next prime is 26415199. The reversal of 26415139 is 93151462.

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

It is a cyclic number.

It is not a de Polignac number, because 26415139 - 2¹¹ = 26413091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26415139.

It is not an unprimeable number, because it can be changed into a prime (26415133) 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, 66847 + ... + 67240.

It is an arithmetic number, because the mean of its divisors is an integer number (6637356).

Almost surely, 2^26415139 is an apocalyptic number.

26415139 is a deficient number, since it is larger than the sum of its proper divisors (134285).

26415139 is a wasteful number, since it uses less digits than its factorization.

26415139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134284.

The product of its digits is 6480, while the sum is 31.

The square root of 26415139 is about 5139.5660322638. The cubic root of 26415139 is about 297.8180164502.

The spelling of 26415139 in words is "twenty-six million, four hundred fifteen thousand, one hundred thirty-nine".