1218624 has 56 divisors (see below), whose sum is σ = 3523488. Its totient is φ = 368640.

The previous prime is 1218617. The next prime is 1218631. The reversal of 1218624 is 4268121.

It is an interprime number because it is at equal distance from previous prime (1218617) and next prime (1218631).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1218594 and 1218603.

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, 1824 + ... + 2400.

2^1218624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1761744).

1218624 is an abundant number, since it is smaller than the sum of its proper divisors (2304864).

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

1218624 is a wasteful number, since it uses less digits than its factorization.

1218624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 593 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 1218624 is about 1103.9130400534. The cubic root of 1218624 is about 106.8127858558.

The spelling of 1218624 in words is "one million, two hundred eighteen thousand, six hundred twenty-four".