1197855 has 32 divisors (see below), whose sum is σ = 2246400. Its totient is φ = 603936.

The previous prime is 1197829. The next prime is 1197881. The reversal of 1197855 is 5587911.

It is an interprime number because it is at equal distance from previous prime (1197829) and next prime (1197881).

It is not a de Polignac number, because 1197855 - 2¹¹ = 1195807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2332 + ... + 2798.

It is an arithmetic number, because the mean of its divisors is an integer number (70200).

2^1197855 is an apocalyptic number.

1197855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1197855 is a deficient number, since it is larger than the sum of its proper divisors (1048545).

1197855 is a wasteful number, since it uses less digits than its factorization.

1197855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 494 counting only the distinct ones).

The product of its digits is 12600, while the sum is 36.

The square root of 1197855 is about 1094.4656230325. The cubic root of 1197855 is about 106.2025024148.

The spelling of 1197855 in words is "one million, one hundred ninety-seven thousand, eight hundred fifty-five".