6261161 has 4 divisors (see below), whose sum is σ = 6279252. Its totient is φ = 6243072.

The previous prime is 6261121. The next prime is 6261173. The reversal of 6261161 is 1611626.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4141225 + 2119936 = 2035^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 6261161 - 2⁶ = 6261097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6261121) 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 3 ways as a sum of consecutive naturals, for example, 8516 + ... + 9221.

It is an arithmetic number, because the mean of its divisors is an integer number (1569813).

Almost surely, 2^6261161 is an apocalyptic number.

It is an amenable number.

6261161 is a deficient number, since it is larger than the sum of its proper divisors (18091).

6261161 is a wasteful number, since it uses less digits than its factorization.

6261161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18090.

The product of its digits is 432, while the sum is 23.

The square root of 6261161 is about 2502.2312043454. The cubic root of 6261161 is about 184.3111563307.

Adding to 6261161 its reverse (1611626), we get a palindrome (7872787).

The spelling of 6261161 in words is "six million, two hundred sixty-one thousand, one hundred sixty-one".