1312228 has 12 divisors (see below), whose sum is σ = 2307312. Its totient is φ = 653000.

The previous prime is 1312211. The next prime is 1312229. The reversal of 1312228 is 8222131.

It is not an unprimeable number, because it can be changed into a prime (1312229) 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, 351 + ... + 1657.

It is an arithmetic number, because the mean of its divisors is an integer number (192276).

2^1312228 is an apocalyptic number.

It is an amenable number.

1312228 is a deficient number, since it is larger than the sum of its proper divisors (995084).

1312228 is a wasteful number, since it uses less digits than its factorization.

1312228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1560 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1312228 is about 1145.5252070557. The cubic root of 1312228 is about 109.4804146146.

Adding to 1312228 its reverse (8222131), we get a palindrome (9534359).

Subtracting 1312228 from its reverse (8222131), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 1312 and 228, that added together give a triangular number (1540 = T₅₅).

The spelling of 1312228 in words is "one million, three hundred twelve thousand, two hundred twenty-eight".