1197905 has 12 divisors (see below), whose sum is σ = 1528860. Its totient is φ = 900864.

The previous prime is 1197901. The next prime is 1197907. The reversal of 1197905 is 5097911.

It can be written as a sum of positive squares in 6 ways, for example, as 80656 + 1117249 = 284^2 + 1057^2 .

It is not a de Polignac number, because 1197905 - 2² = 1197901 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1197901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1031 + ... + 1859.

It is an arithmetic number, because the mean of its divisors is an integer number (127405).

2^1197905 is an apocalyptic number.

It is an amenable number.

1197905 is a deficient number, since it is larger than the sum of its proper divisors (330955).

1197905 is an equidigital number, since it uses as much as digits as its factorization.

1197905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 1197905 is about 1094.4884649918. The cubic root of 1197905 is about 106.2039800703.

The spelling of 1197905 in words is "one million, one hundred ninety-seven thousand, nine hundred five".