8235981 has 12 divisors (see below), whose sum is σ = 12811708. Its totient is φ = 5068224.

The previous prime is 8235967. The next prime is 8235989. The reversal of 8235981 is 1895328.

It can be written as a sum of positive squares in 2 ways, for example, as 3132900 + 5103081 = 1770^2 + 2259^2 .

It is not a de Polignac number, because 8235981 - 2¹³ = 8227789 is a prime.

It is a super-2 number, since 2×8235981² = 135662766064722, which contains 22 as substring.

8235981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8235989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35080 + ... + 35313.

Almost surely, 2^8235981 is an apocalyptic number.

It is an amenable number.

8235981 is a deficient number, since it is larger than the sum of its proper divisors (4575727).

8235981 is a wasteful number, since it uses less digits than its factorization.

8235981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70412 (or 70409 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 8235981 is about 2869.8398910044. The cubic root of 8235981 is about 201.9474833251.

It can be divided in two parts, 8235 and 981, that added together give a square (9216 = 96²).

The spelling of 8235981 in words is "eight million, two hundred thirty-five thousand, nine hundred eighty-one".