1315228 has 12 divisors (see below), whose sum is σ = 2341080. Its totient is φ = 646352.

The previous prime is 1315213. The next prime is 1315229. The reversal of 1315228 is 8225131.

It is a junction number, because it is equal to n+sod(n) for n = 1315199 and 1315208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315229) 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, 2551 + ... + 3022.

It is an arithmetic number, because the mean of its divisors is an integer number (195090).

2^1315228 is an apocalyptic number.

It is an amenable number.

1315228 is a deficient number, since it is larger than the sum of its proper divisors (1025852).

1315228 is a wasteful number, since it uses less digits than its factorization.

1315228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636 (or 5634 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1315228 is about 1146.8339025334. The cubic root of 1315228 is about 109.5637820549.

Subtracting 1315228 from its reverse (8225131), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1315228 in words is "one million, three hundred fifteen thousand, two hundred twenty-eight".