1215028 has 12 divisors (see below), whose sum is σ = 2150820. Its totient is φ = 600512.

The previous prime is 1215017. The next prime is 1215029. The reversal of 1215028 is 8205121.

It can be written as a sum of positive squares in 2 ways, for example, as 736164 + 478864 = 858^2 + 692^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1214996 and 1215014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351 + ... + 2062.

It is an arithmetic number, because the mean of its divisors is an integer number (179235).

2^1215028 is an apocalyptic number.

It is an amenable number.

1215028 is a deficient number, since it is larger than the sum of its proper divisors (935792).

1215028 is a wasteful number, since it uses less digits than its factorization.

1215028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506 (or 3504 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1215028 is about 1102.2830852372. The cubic root of 1215028 is about 106.7076188240.

The spelling of 1215028 in words is "one million, two hundred fifteen thousand, twenty-eight".