26257487 has 4 divisors (see below), whose sum is σ = 27639480. Its totient is φ = 24875496.

The previous prime is 26257459. The next prime is 26257493. The reversal of 26257487 is 78475262.

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 26257487 - 2⁶ = 26257423 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 (26257417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690968 + ... + 691005.

It is an arithmetic number, because the mean of its divisors is an integer number (6909870).

Almost surely, 2^26257487 is an apocalyptic number.

26257487 is a deficient number, since it is larger than the sum of its proper divisors (1381993).

26257487 is a wasteful number, since it uses less digits than its factorization.

26257487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381992.

The product of its digits is 188160, while the sum is 41.

The square root of 26257487 is about 5124.2059872726. The cubic root of 26257487 is about 297.2243502816.

The spelling of 26257487 in words is "twenty-six million, two hundred fifty-seven thousand, four hundred eighty-seven".