26249987 has 2 divisors, whose sum is σ = 26249988. Its totient is φ = 26249986.

The previous prime is 26249981. The next prime is 26250031. The reversal of 26249987 is 78994262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26249987 - 2²⁰ = 25201411 is a prime.

It is not a weakly prime, because it can be changed into another prime (26249981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13124993 + 13124994.

It is an arithmetic number, because the mean of its divisors is an integer number (13124994).

Almost surely, 2^26249987 is an apocalyptic number.

26249987 is a deficient number, since it is larger than the sum of its proper divisors (1).

26249987 is an equidigital number, since it uses as much as digits as its factorization.

26249987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 26249987 is about 5123.4741143095. The cubic root of 26249987 is about 297.1960485772.

The spelling of 26249987 in words is "twenty-six million, two hundred forty-nine thousand, nine hundred eighty-seven".