1312061505 has 16 divisors (see below), whose sum is σ = 2133714624. Its totient is φ = 688294080.

The previous prime is 1312061503. The next prime is 1312061507. The reversal of 1312061505 is 5051602131.

It is an interprime number because it is at equal distance from previous prime (1312061503) and next prime (1312061507).

It is not a de Polignac number, because 1312061505 - 2¹ = 1312061503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312061503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716059 + ... + 717888.

It is an arithmetic number, because the mean of its divisors is an integer number (133357164).

Almost surely, 2^1312061505 is an apocalyptic number.

1312061505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312061505 is a deficient number, since it is larger than the sum of its proper divisors (821653119).

1312061505 is a wasteful number, since it uses less digits than its factorization.

1312061505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434016.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1312061505 is about 36222.3895539761. The cubic root of 1312061505 is about 1094.7578414070.

Adding to 1312061505 its reverse (5051602131), we get a palindrome (6363663636).

The spelling of 1312061505 in words is "one billion, three hundred twelve million, sixty-one thousand, five hundred five".