1330252781 has 8 divisors (see below), whose sum is σ = 1562814624. Its totient is φ = 1116295920.

The previous prime is 1330252753. The next prime is 1330252801. The reversal of 1330252781 is 1872520331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1330252781 - 2⁶ = 1330252717 is a prime.

It is a super-2 number, since 2×1330252781² = 3539144922716467922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330252711) 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 7 ways as a sum of consecutive naturals, for example, 4651091 + ... + 4651376.

It is an arithmetic number, because the mean of its divisors is an integer number (195351828).

Almost surely, 2^1330252781 is an apocalyptic number.

1330252781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1330252781 is a deficient number, since it is larger than the sum of its proper divisors (232561843).

1330252781 is a wasteful number, since it uses less digits than its factorization.

1330252781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302491.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1330252781 is about 36472.6305741716. The cubic root of 1330252781 is about 1099.7941160131.

The spelling of 1330252781 in words is "one billion, three hundred thirty million, two hundred fifty-two thousand, seven hundred eighty-one".