1312145 has 16 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 962304.

The previous prime is 1312139. The next prime is 1312153. The reversal of 1312145 is 5412131.

It is a cyclic number.

It is not a de Polignac number, because 1312145 - 2¹² = 1308049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3476 + ... + 3834.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^1312145 is an apocalyptic number.

It is an amenable number.

1312145 is a deficient number, since it is larger than the sum of its proper divisors (398575).

1312145 is a wasteful number, since it uses less digits than its factorization.

1312145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424.

The product of its digits is 120, while the sum is 17.

The square root of 1312145 is about 1145.4889785589. The cubic root of 1312145 is about 109.4781063100.

Adding to 1312145 its reverse (5412131), we get a palindrome (6724276).

The spelling of 1312145 in words is "one million, three hundred twelve thousand, one hundred forty-five".