4509881 has 2 divisors, whose sum is σ = 4509882. Its totient is φ = 4509880.

The previous prime is 4509853. The next prime is 4509887. The reversal of 4509881 is 1889054.

4509881 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4239481 + 270400 = 2059^2 + 520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4509881 is a prime.

It is a super-2 number, since 2×4509881² = 40678053268322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4509887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2254940 + 2254941.

It is an arithmetic number, because the mean of its divisors is an integer number (2254941).

Almost surely, 2^4509881 is an apocalyptic number.

It is an amenable number.

4509881 is a deficient number, since it is larger than the sum of its proper divisors (1).

4509881 is an equidigital number, since it uses as much as digits as its factorization.

4509881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 4509881 is about 2123.6480405190. The cubic root of 4509881 is about 165.2171124157.

The spelling of 4509881 in words is "four million, five hundred nine thousand, eight hundred eighty-one".