7961761 has 4 divisors (see below), whose sum is σ = 8218624. Its totient is φ = 7704900.

The previous prime is 7961743. The next prime is 7961783. The reversal of 7961761 is 1671697.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1671697 = 37 ⋅45181.

It is a cyclic number.

It is not a de Polignac number, because 7961761 - 2¹¹ = 7959713 is a prime.

It is a super-2 number, since 2×7961761² = 126779276442242, which contains 22 as substring.

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 7961761.

It is not an unprimeable number, because it can be changed into a prime (7961711) 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, 128385 + ... + 128446.

It is an arithmetic number, because the mean of its divisors is an integer number (2054656).

Almost surely, 2^7961761 is an apocalyptic number.

It is an amenable number.

7961761 is a deficient number, since it is larger than the sum of its proper divisors (256863).

7961761 is a wasteful number, since it uses less digits than its factorization.

7961761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256862.

The product of its digits is 15876, while the sum is 37.

The square root of 7961761 is about 2821.6592636249. The cubic root of 7961761 is about 199.6808325985.

Subtracting from 7961761 its reverse (1671697), we obtain a square (6290064 = 2508²).

The spelling of 7961761 in words is "seven million, nine hundred sixty-one thousand, seven hundred sixty-one".