1024425821 has 2 divisors, whose sum is σ = 1024425822. Its totient is φ = 1024425820.

The previous prime is 1024425767. The next prime is 1024425839. The reversal of 1024425821 is 1285244201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015123321 + 9302500 = 31861^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024425821 - 2¹⁸ = 1024163677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1024425881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512212910 + 512212911.

It is an arithmetic number, because the mean of its divisors is an integer number (512212911).

Almost surely, 2^1024425821 is an apocalyptic number.

It is an amenable number.

1024425821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024425821 is an equidigital number, since it uses as much as digits as its factorization.

1024425821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 1024425821 is about 32006.6527615744. The cubic root of 1024425821 is about 1008.0765343149.

The spelling of 1024425821 in words is "one billion, twenty-four million, four hundred twenty-five thousand, eight hundred twenty-one".