1024642891 has 2 divisors, whose sum is σ = 1024642892. Its totient is φ = 1024642890.

The previous prime is 1024642781. The next prime is 1024642909. The reversal of 1024642891 is 1982464201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1024642891 - 2⁷ = 1024642763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1024642891.

It is not a weakly prime, because it can be changed into another prime (1024642291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512321445 + 512321446.

It is an arithmetic number, because the mean of its divisors is an integer number (512321446).

Almost surely, 2^1024642891 is an apocalyptic number.

1024642891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024642891 is an equidigital number, since it uses as much as digits as its factorization.

1024642891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1024642891 is about 32010.0435957216. The cubic root of 1024642891 is about 1008.1477311795.

The spelling of 1024642891 in words is "one billion, twenty-four million, six hundred forty-two thousand, eight hundred ninety-one".