1542218 has 4 divisors (see below), whose sum is σ = 2313330. Its totient is φ = 771108.

The previous prime is 1542217. The next prime is 1542221. The reversal of 1542218 is 8122451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8122451 = 2843 ⋅2857.

It can be written as a sum of positive squares in only one way, i.e., 797449 + 744769 = 893^2 + 863^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1542193 and 1542202.

It is not an unprimeable number, because it can be changed into a prime (1542217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385553 + ... + 385556.

2^1542218 is an apocalyptic number.

1542218 is a deficient number, since it is larger than the sum of its proper divisors (771112).

1542218 is an equidigital number, since it uses as much as digits as its factorization.

1542218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771111.

The product of its digits is 640, while the sum is 23.

The square root of 1542218 is about 1241.8607007229. The cubic root of 1542218 is about 115.5354488493.

Adding to 1542218 its reverse (8122451), we get a palindrome (9664669).

The spelling of 1542218 in words is "one million, five hundred forty-two thousand, two hundred eighteen".