1216630 has 16 divisors (see below), whose sum is σ = 2216160. Its totient is φ = 480832.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216630 is 366121.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1216598 and 1216607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (138510).

2^1216630 is an apocalyptic number.

1216630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216630 is a deficient number, since it is larger than the sum of its proper divisors (999530).

1216630 is a wasteful number, since it uses less digits than its factorization.

1216630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1216630 is about 1103.0095194512. The cubic root of 1216630 is about 106.7544958042.

The spelling of 1216630 in words is "one million, two hundred sixteen thousand, six hundred thirty".