26399001 has 8 divisors (see below), whose sum is σ = 35247520. Its totient is φ = 17574912.

The previous prime is 26398997. The next prime is 26399017. The reversal of 26399001 is 10099362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26399001 - 2² = 26398997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26399001.

It is not an unprimeable number, because it can be changed into a prime (26399071) 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 7 ways as a sum of consecutive naturals, for example, 3415 + ... + 8028.

It is an arithmetic number, because the mean of its divisors is an integer number (4405940).

Almost surely, 2^26399001 is an apocalyptic number.

It is an amenable number.

26399001 is a deficient number, since it is larger than the sum of its proper divisors (8848519).

26399001 is a wasteful number, since it uses less digits than its factorization.

26399001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12215.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 26399001 is about 5137.9958154907. The cubic root of 26399001 is about 297.7573546930.

The spelling of 26399001 in words is "twenty-six million, three hundred ninety-nine thousand, one".