1025304778 has 4 divisors (see below), whose sum is σ = 1537957170. Its totient is φ = 512652388.

The previous prime is 1025304751. The next prime is 1025304779. The reversal of 1025304778 is 8774035201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 938013129 + 87291649 = 30627^2 + 9343^2 .

It is not an unprimeable number, because it can be changed into a prime (1025304779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256326193 + ... + 256326196.

Almost surely, 2^1025304778 is an apocalyptic number.

1025304778 is a deficient number, since it is larger than the sum of its proper divisors (512652392).

1025304778 is an equidigital number, since it uses as much as digits as its factorization.

1025304778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512652391.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1025304778 is about 32020.3806660695. The cubic root of 1025304778 is about 1008.3647616702.

Adding to 1025304778 its reverse (8774035201), we get a palindrome (9799339979).

The spelling of 1025304778 in words is "one billion, twenty-five million, three hundred four thousand, seven hundred seventy-eight".