1311257327 has 4 divisors (see below), whose sum is σ = 1311618000. Its totient is φ = 1310896656.

The previous prime is 1311257309. The next prime is 1311257329. The reversal of 1311257327 is 7237521131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7237521131 = 227 ⋅31883353.

It is a cyclic number.

It is not a de Polignac number, because 1311257327 - 2⁶ = 1311257263 is a prime.

It is a super-2 number, since 2×1311257327² = 3438791555222369858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311257293 and 1311257302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311257329) 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, 174827 + ... + 182172.

It is an arithmetic number, because the mean of its divisors is an integer number (327904500).

Almost surely, 2^1311257327 is an apocalyptic number.

1311257327 is a deficient number, since it is larger than the sum of its proper divisors (360673).

1311257327 is an equidigital number, since it uses as much as digits as its factorization.

1311257327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360672.

The product of its digits is 8820, while the sum is 32.

The square root of 1311257327 is about 36211.2872872534. The cubic root of 1311257327 is about 1094.5341323572.

Adding to 1311257327 its reverse (7237521131), we get a palindrome (8548778458).

The spelling of 1311257327 in words is "one billion, three hundred eleven million, two hundred fifty-seven thousand, three hundred twenty-seven".