1320127481 has 4 divisors (see below), whose sum is σ = 1377524352. Its totient is φ = 1262730612.

The previous prime is 1320127463. The next prime is 1320127489. The reversal of 1320127481 is 1847210231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1847210231 = 4583 ⋅403057.

It is a cyclic number.

It is not a de Polignac number, because 1320127481 - 2¹⁴ = 1320111097 is a prime.

It is a super-2 number, since 2×1320127481² = 3485473132182810722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320127489) 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, 28698401 + ... + 28698446.

It is an arithmetic number, because the mean of its divisors is an integer number (344381088).

Almost surely, 2^1320127481 is an apocalyptic number.

It is an amenable number.

1320127481 is a deficient number, since it is larger than the sum of its proper divisors (57396871).

1320127481 is an equidigital number, since it uses as much as digits as its factorization.

1320127481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57396870.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1320127481 is about 36333.5586063353. The cubic root of 1320127481 is about 1096.9966229166.

The spelling of 1320127481 in words is "one billion, three hundred twenty million, one hundred twenty-seven thousand, four hundred eighty-one".