24887561 has 2 divisors, whose sum is σ = 24887562. Its totient is φ = 24887560.

The previous prime is 24887531. The next prime is 24887567. The reversal of 24887561 is 16578842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21715600 + 3171961 = 4660^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 24887561 - 2¹⁴ = 24871177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (24887567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12443780 + 12443781.

It is an arithmetic number, because the mean of its divisors is an integer number (12443781).

Almost surely, 2^24887561 is an apocalyptic number.

It is an amenable number.

24887561 is a deficient number, since it is larger than the sum of its proper divisors (1).

24887561 is an equidigital number, since it uses as much as digits as its factorization.

24887561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 24887561 is about 4988.7434289608. The cubic root of 24887561 is about 291.9627501429.

The spelling of 24887561 in words is "twenty-four million, eight hundred eighty-seven thousand, five hundred sixty-one".