1320221752 has 16 divisors (see below), whose sum is σ = 2560775400. Its totient is φ = 637348320.

The previous prime is 1320221741. The next prime is 1320221759. The reversal of 1320221752 is 2571220231.

It is a super-3 number, since 3×1320221752³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320221759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2845074 + ... + 2845537.

Almost surely, 2^1320221752 is an apocalyptic number.

It is an amenable number.

1320221752 is a deficient number, since it is larger than the sum of its proper divisors (1240553648).

1320221752 is a wasteful number, since it uses less digits than its factorization.

1320221752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690646 (or 5690642 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1320221752 is about 36334.8558824719. The cubic root of 1320221752 is about 1097.0227346643.

Adding to 1320221752 its reverse (2571220231), we get a palindrome (3891441983).

The spelling of 1320221752 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, seven hundred fifty-two".