4987561 has 2 divisors, whose sum is σ = 4987562. Its totient is φ = 4987560.

The previous prime is 4987531. The next prime is 4987571. The reversal of 4987561 is 1657894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3041536 + 1946025 = 1744^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 4987561 - 2¹⁵ = 4954793 is a prime.

It is a super-3 number, since 3×4987561³ (a number of 21 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (4987501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493780 + 2493781.

It is an arithmetic number, because the mean of its divisors is an integer number (2493781).

Almost surely, 2^4987561 is an apocalyptic number.

It is an amenable number.

4987561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4987561 is an equidigital number, since it uses as much as digits as its factorization.

4987561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 4987561 is about 2233.2848004677. The cubic root of 4987561 is about 170.8556743074.

The spelling of 4987561 in words is "four million, nine hundred eighty-seven thousand, five hundred sixty-one".