34112781 has 6 divisors (see below), whose sum is σ = 49274030. Its totient is φ = 22741848.

The previous prime is 34112773. The next prime is 34112783. The reversal of 34112781 is 18721143.

It can be written as a sum of positive squares in only one way, i.e., 29975625 + 4137156 = 5475^2 + 2034^2 .

It is not a de Polignac number, because 34112781 - 2³ = 34112773 is a prime.

It is a super-2 number, since 2×34112781² = 2327363655107922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34112783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1895146 + ... + 1895163.

Almost surely, 2^34112781 is an apocalyptic number.

It is an amenable number.

34112781 is a deficient number, since it is larger than the sum of its proper divisors (15161249).

34112781 is a wasteful number, since it uses less digits than its factorization.

34112781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790315 (or 3790312 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 34112781 is about 5840.6147792848. The cubic root of 34112781 is about 324.3189873992.

It can be divided in two parts, 3 and 4112781, that added together give a square (4112784 = 2028²).

The spelling of 34112781 in words is "thirty-four million, one hundred twelve thousand, seven hundred eighty-one".