1215441 has 6 divisors (see below), whose sum is σ = 1755650. Its totient is φ = 810288.

The previous prime is 1215439. The next prime is 1215451. The reversal of 1215441 is 1445121.

1215441 is a `hidden beast` number, since 121 + 544 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 484416 = 855^2 + 696^2 .

It is not a de Polignac number, because 1215441 - 2¹ = 1215439 is a prime.

It is a super-3 number, since 3×1215441³ = 5386701388932033363, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67516 + ... + 67533.

2^1215441 is an apocalyptic number.

It is an amenable number.

1215441 is a deficient number, since it is larger than the sum of its proper divisors (540209).

1215441 is a wasteful number, since it uses less digits than its factorization.

1215441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135055 (or 135052 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 1215441 is about 1102.4704077661. The cubic root of 1215441 is about 106.7197077784.

The spelling of 1215441 in words is "one million, two hundred fifteen thousand, four hundred forty-one".