1025904521 has 2 divisors, whose sum is σ = 1025904522. Its totient is φ = 1025904520.

The previous prime is 1025904511. The next prime is 1025904533. The reversal of 1025904521 is 1254095201.

1025904521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529506121 + 496398400 = 23011^2 + 22280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025904521 - 2¹⁸ = 1025642377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025904511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512952260 + 512952261.

It is an arithmetic number, because the mean of its divisors is an integer number (512952261).

Almost surely, 2^1025904521 is an apocalyptic number.

It is an amenable number.

1025904521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025904521 is an equidigital number, since it uses as much as digits as its factorization.

1025904521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1025904521 is about 32029.7443168065. The cubic root of 1025904521 is about 1008.5613347095.

Adding to 1025904521 its reverse (1254095201), we get a palindrome (2279999722).

The spelling of 1025904521 in words is "one billion, twenty-five million, nine hundred four thousand, five hundred twenty-one".