1218490 has 48 divisors (see below), whose sum is σ = 2740608. Its totient is φ = 381888.

The previous prime is 1218487. The next prime is 1218533. The reversal of 1218490 is 948121.

It is a happy number.

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11779 + ... + 11881.

It is an arithmetic number, because the mean of its divisors is an integer number (57096).

2^1218490 is an apocalyptic number.

1218490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218490 is an abundant number, since it is smaller than the sum of its proper divisors (1522118).

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

1218490 is a wasteful number, since it uses less digits than its factorization.

1218490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1218490 is about 1103.8523451984. The cubic root of 1218490 is about 106.8088706646.

The spelling of 1218490 in words is "one million, two hundred eighteen thousand, four hundred ninety".