1306155 has 16 divisors (see below), whose sum is σ = 2200320. Its totient is φ = 659808.

The previous prime is 1306139. The next prime is 1306157. The reversal of 1306155 is 5516031.

It is a happy number.

It is not a de Polignac number, because 1306155 - 2⁴ = 1306139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306157) 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, 2007 + ... + 2576.

It is an arithmetic number, because the mean of its divisors is an integer number (137520).

2^1306155 is an apocalyptic number.

1306155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1306155 is a deficient number, since it is larger than the sum of its proper divisors (894165).

1306155 is a wasteful number, since it uses less digits than its factorization.

1306155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4610.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1306155 is about 1142.8713838398. The cubic root of 1306155 is about 109.3112613667.

The spelling of 1306155 in words is "one million, three hundred six thousand, one hundred fifty-five".