8720761 has 8 divisors (see below), whose sum is σ = 10023104. Its totient is φ = 7432560.

The previous prime is 8720729. The next prime is 8720771. The reversal of 8720761 is 1670278.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8720761 - 2⁵ = 8720729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8720771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2175 + ... + 4708.

It is an arithmetic number, because the mean of its divisors is an integer number (1252888).

Almost surely, 2^8720761 is an apocalyptic number.

It is an amenable number.

8720761 is a deficient number, since it is larger than the sum of its proper divisors (1302343).

8720761 is a wasteful number, since it uses less digits than its factorization.

8720761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 8720761 is about 2953.0934627946. The cubic root of 8720761 is about 205.8344807351.

The spelling of 8720761 in words is "eight million, seven hundred twenty thousand, seven hundred sixty-one".