26042491 has 2 divisors, whose sum is σ = 26042492. Its totient is φ = 26042490.

The previous prime is 26042459. The next prime is 26042537. The reversal of 26042491 is 19424062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26042491 - 2⁵ = 26042459 is a prime.

It is a super-2 number, since 2×26042491² = 1356422674970162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26042411) 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 as a sum of consecutive naturals, namely, 13021245 + 13021246.

It is an arithmetic number, because the mean of its divisors is an integer number (13021246).

Almost surely, 2^26042491 is an apocalyptic number.

26042491 is a deficient number, since it is larger than the sum of its proper divisors (1).

26042491 is an equidigital number, since it uses as much as digits as its factorization.

26042491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 26042491 is about 5103.1843980009. The cubic root of 26042491 is about 296.4109028779.

The spelling of 26042491 in words is "twenty-six million, forty-two thousand, four hundred ninety-one".