1320000751257 has 4 divisors (see below), whose sum is σ = 1760001001680. Its totient is φ = 880000500836.

The previous prime is 1320000751243. The next prime is 1320000751259. The reversal of 1320000751257 is 7521570000231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320000751257 - 2⁷ = 1320000751129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320000751259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220000125207 + ... + 220000125212.

It is an arithmetic number, because the mean of its divisors is an integer number (440000250420).

Almost surely, 2^{1320000751257} is an apocalyptic number.

It is an amenable number.

1320000751257 is a deficient number, since it is larger than the sum of its proper divisors (440000250423).

1320000751257 is an equidigital number, since it uses as much as digits as its factorization.

1320000751257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440000250422.

The product of its (nonzero) digits is 14700, while the sum is 33.

Adding to 1320000751257 its reverse (7521570000231), we get a palindrome (8841570751488).

The spelling of 1320000751257 in words is "one trillion, three hundred twenty billion, seven hundred fifty-one thousand, two hundred fifty-seven".