1209135 has 16 divisors (see below), whose sum is σ = 1951200. Its totient is φ = 639360.

The previous prime is 1209121. The next prime is 1209139. The reversal of 1209135 is 5319021.

It is not a de Polignac number, because 1209135 - 2⁷ = 1209007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1965 + ... + 2505.

It is an arithmetic number, because the mean of its divisors is an integer number (121950).

2^1209135 is an apocalyptic number.

1209135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1209135 is a deficient number, since it is larger than the sum of its proper divisors (742065).

1209135 is a wasteful number, since it uses less digits than its factorization.

1209135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1209135 is about 1099.6067478876. The cubic root of 1209135 is about 106.5348251734.

The spelling of 1209135 in words is "one million, two hundred nine thousand, one hundred thirty-five".