1209138 has 16 divisors (see below), whose sum is σ = 2763840. Its totient is φ = 345456.

The previous prime is 1209121. The next prime is 1209139. The reversal of 1209138 is 8319021.

It is a super-3 number, since 3×1209138³ = 5303332602027648216, which contains 333 as substring.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

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 7 ways as a sum of consecutive naturals, for example, 14353 + ... + 14436.

It is an arithmetic number, because the mean of its divisors is an integer number (172740).

2^1209138 is an apocalyptic number.

1209138 is an abundant number, since it is smaller than the sum of its proper divisors (1554702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209138 is a wasteful number, since it uses less digits than its factorization.

1209138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28801.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1209138 is about 1099.6081120108. The cubic root of 1209138 is about 106.5349132817.

The spelling of 1209138 in words is "one million, two hundred nine thousand, one hundred thirty-eight".