1025221264 has 10 divisors (see below), whose sum is σ = 1986366230. Its totient is φ = 512610624.

The previous prime is 1025221237. The next prime is 1025221273. The reversal of 1025221264 is 4621225201.

It can be written as a sum of positive squares in only one way, i.e., 794788864 + 230432400 = 28192^2 + 15180^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32038149 + ... + 32038180.

It is an arithmetic number, because the mean of its divisors is an integer number (198636623).

Almost surely, 2^1025221264 is an apocalyptic number.

It is an amenable number.

1025221264 is a deficient number, since it is larger than the sum of its proper divisors (961144966).

1025221264 is an equidigital number, since it uses as much as digits as its factorization.

1025221264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64076337 (or 64076331 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1025221264 is about 32019.0765638236. The cubic root of 1025221264 is about 1008.3373828644.

Adding to 1025221264 its reverse (4621225201), we get a palindrome (5646446465).

The spelling of 1025221264 in words is "one billion, twenty-five million, two hundred twenty-one thousand, two hundred sixty-four".