1312155 has 24 divisors (see below), whose sum is σ = 2450448. Its totient is φ = 645696.

The previous prime is 1312153. The next prime is 1312169. The reversal of 1312155 is 5512131.

It is not a de Polignac number, because 1312155 - 2¹ = 1312153 is a prime.

1312155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1312153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 537 + ... + 1706.

It is an arithmetic number, because the mean of its divisors is an integer number (102102).

2^1312155 is an apocalyptic number.

1312155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312155 is a deficient number, since it is larger than the sum of its proper divisors (1138293).

1312155 is a wasteful number, since it uses less digits than its factorization.

1312155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267 (or 2264 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1312155 is about 1145.4933434988. The cubic root of 1312155 is about 109.4783844241.

Adding to 1312155 its reverse (5512131), we get a palindrome (6824286).

The spelling of 1312155 in words is "one million, three hundred twelve thousand, one hundred fifty-five".