1209090 has 32 divisors (see below), whose sum is σ = 2975616. Its totient is φ = 314240.

The previous prime is 1209083. The next prime is 1209107. The reversal of 1209090 is 909021.

It is a happy number.

1209090 is a modest number, since divided by 9090 gives 120 as remainder.

It is a Curzon number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739 + ... + 1721.

It is an arithmetic number, because the mean of its divisors is an integer number (92988).

2^1209090 is an apocalyptic number.

1209090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487808).

1209090 is an abundant number, since it is smaller than the sum of its proper divisors (1766526).

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

1209090 is a wasteful number, since it uses less digits than its factorization.

1209090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1209090 is about 1099.5862858366. The cubic root of 1209090 is about 106.5335035326.

The spelling of 1209090 in words is "one million, two hundred nine thousand, ninety".