940587561 has 9 divisors (see below), whose sum is σ = 1358759389. Its totient is φ = 626997036.

The previous prime is 940587559. The next prime is 940587581. The reversal of 940587561 is 165785049.

The square root of 940587561 is 30669.

It is a perfect power (a square), and thus also a powerful number.

940587561 is a `hidden beast` number, since 9 + 4 + 0 + 5 + 87 + 561 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 940587561 - 2¹ = 940587559 is a prime.

It is a super-3 number, since 3×940587561³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (940587551) 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 8 ways as a sum of consecutive naturals, for example, 86896 + ... + 97118.

Almost surely, 2^940587561 is an apocalyptic number.

940587561 is the 30669-th square number.

940587561 is the 15335-th centered octagonal number.

It is an amenable number.

940587561 is a deficient number, since it is larger than the sum of its proper divisors (418171828).

940587561 is an frugal number, since it uses more digits than its factorization.

940587561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20452 (or 10226 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The cubic root of 940587561 is about 979.7901678337.

The spelling of 940587561 in words is "nine hundred forty million, five hundred eighty-seven thousand, five hundred sixty-one".