1215480 has 64 divisors (see below), whose sum is σ = 4170240. Its totient is φ = 277632.

The previous prime is 1215463. The next prime is 1215497. The reversal of 1215480 is 845121.

It is an interprime number because it is at equal distance from previous prime (1215463) and next prime (1215497).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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, 117 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (65160).

2^1215480 is an apocalyptic number.

1215480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2085120).

1215480 is an abundant number, since it is smaller than the sum of its proper divisors (2954760).

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

1215480 is a wasteful number, since it uses less digits than its factorization.

1215480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1215480 is about 1102.4880951738. The cubic root of 1215480 is about 106.7208492088.

The spelling of 1215480 in words is "one million, two hundred fifteen thousand, four hundred eighty".