5961781 has 18 divisors (see below), whose sum is σ = 7384578. Its totient is φ = 4798080.

The previous prime is 5961779. The next prime is 5961793. The reversal of 5961781 is 1871695.

It can be written as a sum of positive squares in 3 ways, for example, as 625681 + 5336100 = 791^2 + 2310^2 .

It is not a de Polignac number, because 5961781 - 2¹ = 5961779 is a prime.

It is a super-2 number, since 2×5961781² = 71085665383922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5961781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5961721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13951 + ... + 14371.

Almost surely, 2^5961781 is an apocalyptic number.

It is an amenable number.

5961781 is a deficient number, since it is larger than the sum of its proper divisors (1422797).

5961781 is a wasteful number, since it uses less digits than its factorization.

5961781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 445 counting only the distinct ones).

The product of its digits is 15120, while the sum is 37.

The square root of 5961781 is about 2441.6758589133. The cubic root of 5961781 is about 181.3254119804.

The spelling of 5961781 in words is "five million, nine hundred sixty-one thousand, seven hundred eighty-one".