1209630 has 32 divisors (see below), whose sum is σ = 2955168. Its totient is φ = 316800.

The previous prime is 1209629. The next prime is 1209631. The reversal of 1209630 is 369021.

It is an interprime number because it is at equal distance from previous prime (1209629) and next prime (1209631).

It is a junction number, because it is equal to n+sod(n) for n = 1209597 and 1209606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209631) by changing a digit.

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, 1500 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (92349).

2^1209630 is an apocalyptic number.

1209630 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 1209630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1477584).

1209630 is an abundant number, since it is smaller than the sum of its proper divisors (1745538).

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

1209630 is a wasteful number, since it uses less digits than its factorization.

1209630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1209630 is about 1099.8318053230. The cubic root of 1209630 is about 106.5493610590.

The spelling of 1209630 in words is "one million, two hundred nine thousand, six hundred thirty".