24128981 has 2 divisors, whose sum is σ = 24128982. Its totient is φ = 24128980.

The previous prime is 24128971. The next prime is 24128983. The reversal of 24128981 is 18982142.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13205956 + 10923025 = 3634^2 + 3305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24128981 is a prime.

It is a super-2 number, since 2×24128981² = 1164415448196722, which contains 22 as substring.

Together with 24128983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24128983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12064490 + 12064491.

It is an arithmetic number, because the mean of its divisors is an integer number (12064491).

Almost surely, 2^24128981 is an apocalyptic number.

It is an amenable number.

24128981 is a deficient number, since it is larger than the sum of its proper divisors (1).

24128981 is an equidigital number, since it uses as much as digits as its factorization.

24128981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 24128981 is about 4912.1259145099. The cubic root of 24128981 is about 288.9657211212.

The spelling of 24128981 in words is "twenty-four million, one hundred twenty-eight thousand, nine hundred eighty-one".