1320252566 has 4 divisors (see below), whose sum is σ = 1980378852. Its totient is φ = 660126282.

The previous prime is 1320252541. The next prime is 1320252587. The reversal of 1320252566 is 6652520231.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330063140 + ... + 330063143.

It is an arithmetic number, because the mean of its divisors is an integer number (495094713).

Almost surely, 2^1320252566 is an apocalyptic number.

1320252566 is a deficient number, since it is larger than the sum of its proper divisors (660126286).

1320252566 is an equidigital number, since it uses as much as digits as its factorization.

1320252566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660126285.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1320252566 is about 36335.2799081003. The cubic root of 1320252566 is about 1097.0312694415.

Adding to 1320252566 its reverse (6652520231), we get a palindrome (7972772797).

The spelling of 1320252566 in words is "one billion, three hundred twenty million, two hundred fifty-two thousand, five hundred sixty-six".