7861761 has 6 divisors (see below), whose sum is σ = 11355890. Its totient is φ = 5241168.

The previous prime is 7861757. The next prime is 7861781. The reversal of 7861761 is 1671687.

It is a happy number.

7861761 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5089536 + 2772225 = 2256^2 + 1665^2 .

It is not a de Polignac number, because 7861761 - 2² = 7861757 is a prime.

It is a super-2 number, since 2×7861761² = 123614572042242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7861781) 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 5 ways as a sum of consecutive naturals, for example, 436756 + ... + 436773.

Almost surely, 2^7861761 is an apocalyptic number.

It is an amenable number.

7861761 is a deficient number, since it is larger than the sum of its proper divisors (3494129).

7861761 is a wasteful number, since it uses less digits than its factorization.

7861761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873535 (or 873532 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 7861761 is about 2803.8832001351. The cubic root of 7861761 is about 198.8413084665.

The spelling of 7861761 in words is "seven million, eight hundred sixty-one thousand, seven hundred sixty-one".