1197555 has 16 divisors (see below), whose sum is σ = 1982880. Its totient is φ = 616448.

The previous prime is 1197527. The next prime is 1197571. The reversal of 1197555 is 5557911.

It is a cyclic number.

It is not a de Polignac number, because 1197555 - 2¹² = 1193459 is a prime.

It is an Ulam number.

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 15 ways as a sum of consecutive naturals, for example, 942 + ... + 1811.

It is an arithmetic number, because the mean of its divisors is an integer number (123930).

2^1197555 is an apocalyptic number.

1197555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1197555 is a deficient number, since it is larger than the sum of its proper divisors (785325).

1197555 is a wasteful number, since it uses less digits than its factorization.

1197555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790.

The product of its digits is 7875, while the sum is 33.

The square root of 1197555 is about 1094.3285612649. The cubic root of 1197555 is about 106.1936356179.

The spelling of 1197555 in words is "one million, one hundred ninety-seven thousand, five hundred fifty-five".