1025215289 has 6 divisors (see below), whose sum is σ = 1192597434. Its totient is φ = 878755920.

The previous prime is 1025215259. The next prime is 1025215333. The reversal of 1025215289 is 9825125201.

It can be written as a sum of positive squares in only one way, i.e., 733488889 + 291726400 = 27083^2 + 17080^2 .

It is not a de Polignac number, because 1025215289 - 2¹⁶ = 1025149753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025215259) 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 in 5 ways as a sum of consecutive naturals, for example, 10461332 + ... + 10461429.

It is an arithmetic number, because the mean of its divisors is an integer number (198766239).

Almost surely, 2^1025215289 is an apocalyptic number.

It is an amenable number.

1025215289 is a deficient number, since it is larger than the sum of its proper divisors (167382145).

1025215289 is an equidigital number, since it uses as much as digits as its factorization.

1025215289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20922775 (or 20922768 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 1025215289 is about 32018.9832599350. The cubic root of 1025215289 is about 1008.3354239937.

The spelling of 1025215289 in words is "one billion, twenty-five million, two hundred fifteen thousand, two hundred eighty-nine".