1311502345 has 8 divisors (see below), whose sum is σ = 1575724680. Its totient is φ = 1047920640.

The previous prime is 1311502267. The next prime is 1311502369. The reversal of 1311502345 is 5432051131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 112126921 + 1199375424 = 10589^2 + 34632^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311502345 - 2¹¹ = 1311500297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155640 + ... + 163849.

It is an arithmetic number, because the mean of its divisors is an integer number (196965585).

Almost surely, 2^1311502345 is an apocalyptic number.

It is an amenable number.

1311502345 is a deficient number, since it is larger than the sum of its proper divisors (264222335).

1311502345 is an equidigital number, since it uses as much as digits as its factorization.

1311502345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320315.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1311502345 is about 36214.6703008601. The cubic root of 1311502345 is about 1094.6023020079.

Adding to 1311502345 its reverse (5432051131), we get a palindrome (6743553476).

The spelling of 1311502345 in words is "one billion, three hundred eleven million, five hundred two thousand, three hundred forty-five".