1311302457 has 6 divisors (see below), whose sum is σ = 1894103562. Its totient is φ = 874201632.

The previous prime is 1311302413. The next prime is 1311302471. The reversal of 1311302457 is 7542031131.

1311302457 is a `hidden beast` number, since 1 + 311 + 302 + 45 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1264229136 + 47073321 = 35556^2 + 6861^2 .

It is not a de Polignac number, because 1311302457 - 2⁶ = 1311302393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311302457.

It is not an unprimeable number, because it can be changed into a prime (1311309457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72850128 + ... + 72850145.

It is an arithmetic number, because the mean of its divisors is an integer number (315683927).

Almost surely, 2^1311302457 is an apocalyptic number.

It is an amenable number.

1311302457 is a deficient number, since it is larger than the sum of its proper divisors (582801105).

1311302457 is a wasteful number, since it uses less digits than its factorization.

1311302457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145700279 (or 145700276 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1311302457 is about 36211.9104301333. The cubic root of 1311302457 is about 1094.5466892006.

Adding to 1311302457 its reverse (7542031131), we get a palindrome (8853333588).

The spelling of 1311302457 in words is "one billion, three hundred eleven million, three hundred two thousand, four hundred fifty-seven".