1218632 has 32 divisors (see below), whose sum is σ = 2462400. Its totient is φ = 563904.

The previous prime is 1218631. The next prime is 1218649. The reversal of 1218632 is 2368121.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1218598 and 1218607.

It is not an unprimeable number, because it can be changed into a prime (1218631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6719 + ... + 6897.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2^1218632 is an apocalyptic number.

It is an amenable number.

1218632 is an abundant number, since it is smaller than the sum of its proper divisors (1243768).

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

1218632 is a wasteful number, since it uses less digits than its factorization.

1218632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 241 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 1218632 is about 1103.9166635213. The cubic root of 1218632 is about 106.8130195895.

The spelling of 1218632 in words is "one million, two hundred eighteen thousand, six hundred thirty-two".