1025541421 has 2 divisors, whose sum is σ = 1025541422. Its totient is φ = 1025541420.

The previous prime is 1025541379. The next prime is 1025541499. The reversal of 1025541421 is 1241455201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605701321 + 419840100 = 24611^2 + 20490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025541421 - 2⁹ = 1025540909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025548421) 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, 512770710 + 512770711.

It is an arithmetic number, because the mean of its divisors is an integer number (512770711).

Almost surely, 2^1025541421 is an apocalyptic number.

It is an amenable number.

1025541421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025541421 is an equidigital number, since it uses as much as digits as its factorization.

1025541421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1025541421 is about 32024.0756463009. The cubic root of 1025541421 is about 1008.4423334360.

Adding to 1025541421 its reverse (1241455201), we get a palindrome (2266996622).

The spelling of 1025541421 in words is "one billion, twenty-five million, five hundred forty-one thousand, four hundred twenty-one".