1311500145 has 8 divisors (see below), whose sum is σ = 2098400256. Its totient is φ = 699466736.

The previous prime is 1311500131. The next prime is 1311500149. The reversal of 1311500145 is 5410051131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1311500145 - 2⁷ = 1311500017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311500149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43716657 + ... + 43716686.

It is an arithmetic number, because the mean of its divisors is an integer number (262300032).

Almost surely, 2^1311500145 is an apocalyptic number.

1311500145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311500145 is a deficient number, since it is larger than the sum of its proper divisors (786900111).

1311500145 is an equidigital number, since it uses as much as digits as its factorization.

1311500145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87433351.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1311500145 is about 36214.6399264165. The cubic root of 1311500145 is about 1094.6016899550.

Adding to 1311500145 its reverse (5410051131), we get a palindrome (6721551276).

The spelling of 1311500145 in words is "one billion, three hundred eleven million, five hundred thousand, one hundred forty-five".