1321712427 has 32 divisors (see below), whose sum is σ = 2098944000. Its totient is φ = 739167744.

The previous prime is 1321712419. The next prime is 1321712467. The reversal of 1321712427 is 7242171231.

It is not a de Polignac number, because 1321712427 - 2³ = 1321712419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321712394 and 1321712403.

It is not an unprimeable number, because it can be changed into a prime (1321712467) 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 31 ways as a sum of consecutive naturals, for example, 34699 + ... + 62027.

It is an arithmetic number, because the mean of its divisors is an integer number (65592000).

Almost surely, 2^1321712427 is an apocalyptic number.

1321712427 is a deficient number, since it is larger than the sum of its proper divisors (777231573).

1321712427 is an equidigital number, since it uses as much as digits as its factorization.

1321712427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27400 (or 27386 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 1321712427 is about 36355.3631119261. The cubic root of 1321712427 is about 1097.4354656491.

Adding to 1321712427 its reverse (7242171231), we get a palindrome (8563883658).

The spelling of 1321712427 in words is "one billion, three hundred twenty-one million, seven hundred twelve thousand, four hundred twenty-seven".