8701561 has 8 divisors (see below), whose sum is σ = 9582624. Its totient is φ = 7835520.

The previous prime is 8701559. The next prime is 8701571. The reversal of 8701561 is 1651078.

It is a happy number.

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

It is not a de Polignac number, because 8701561 - 2¹ = 8701559 is a prime.

It is a Duffinian number.

8701561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8701531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2520 + ... + 4873.

It is an arithmetic number, because the mean of its divisors is an integer number (1197828).

Almost surely, 2^8701561 is an apocalyptic number.

It is an amenable number.

8701561 is a deficient number, since it is larger than the sum of its proper divisors (881063).

8701561 is a wasteful number, since it uses less digits than its factorization.

8701561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7511.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 8701561 is about 2949.8408431643. The cubic root of 8701561 is about 205.6833117451.

The spelling of 8701561 in words is "eight million, seven hundred one thousand, five hundred sixty-one".