1215444 has 12 divisors (see below), whose sum is σ = 2836064. Its totient is φ = 405144.

The previous prime is 1215439. The next prime is 1215451. The reversal of 1215444 is 4445121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1215444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50632 + ... + 50655.

2^1215444 is an apocalyptic number.

It is an amenable number.

1215444 is an abundant number, since it is smaller than the sum of its proper divisors (1620620).

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

1215444 is a wasteful number, since it uses less digits than its factorization.

1215444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101294 (or 101292 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 1215444 is about 1102.4717683460. The cubic root of 1215444 is about 106.7197955816.

It can be divided in two parts, 121 and 5444, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 1215444 in words is "one million, two hundred fifteen thousand, four hundred forty-four".