26401231 has 4 divisors (see below), whose sum is σ = 26428864. Its totient is φ = 26373600.

The previous prime is 26401229. The next prime is 26401259. The reversal of 26401231 is 13210462.

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 26401231 - 2¹ = 26401229 is a prime.

It is a super-2 number, since 2×26401231² = 1394049996630722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26401199 and 26401208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26401201) 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, 12330 + ... + 14311.

It is an arithmetic number, because the mean of its divisors is an integer number (6607216).

Almost surely, 2^26401231 is an apocalyptic number.

26401231 is a deficient number, since it is larger than the sum of its proper divisors (27633).

26401231 is an equidigital number, since it uses as much as digits as its factorization.

26401231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27632.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 26401231 is about 5138.2128215947. The cubic root of 26401231 is about 297.7657385987.

Adding to 26401231 its reverse (13210462), we get a palindrome (39611693).

The spelling of 26401231 in words is "twenty-six million, four hundred one thousand, two hundred thirty-one".