1371218 has 4 divisors (see below), whose sum is σ = 2056830. Its totient is φ = 685608.

The previous prime is 1371217. The next prime is 1371229. The reversal of 1371218 is 8121731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8121731 = 41 ⋅198091.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 677329 = 833^2 + 823^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1371193 and 1371202.

It is not an unprimeable number, because it can be changed into a prime (1371217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342803 + ... + 342806.

2^1371218 is an apocalyptic number.

1371218 is a deficient number, since it is larger than the sum of its proper divisors (685612).

1371218 is an equidigital number, since it uses as much as digits as its factorization.

1371218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685611.

The product of its digits is 336, while the sum is 23.

The square root of 1371218 is about 1170.9901792927. The cubic root of 1371218 is about 111.0969582714.

Adding to 1371218 its sum of digits (23), we get a square (1371241 = 1171²).

Adding to 1371218 its reverse (8121731), we get a palindrome (9492949).

The spelling of 1371218 in words is "one million, three hundred seventy-one thousand, two hundred eighteen".