81426235 has 16 divisors (see below), whose sum is σ = 106774272. Its totient is φ = 59119200.

The previous prime is 81426227. The next prime is 81426253. The reversal of 81426235 is 53262418.

It is not a de Polignac number, because 81426235 - 2³ = 81426227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81426197 and 81426206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52420 + ... + 53950.

It is an arithmetic number, because the mean of its divisors is an integer number (6673392).

Almost surely, 2^81426235 is an apocalyptic number.

81426235 is a deficient number, since it is larger than the sum of its proper divisors (25348037).

81426235 is a wasteful number, since it uses less digits than its factorization.

81426235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514.

The product of its digits is 11520, while the sum is 31.

The square root of 81426235 is about 9023.6486522914. The cubic root of 81426235 is about 433.4324786291.

The spelling of 81426235 in words is "eighty-one million, four hundred twenty-six thousand, two hundred thirty-five".