1421242 has 4 divisors (see below), whose sum is σ = 2131866. Its totient is φ = 710620.

The previous prime is 1421227. The next prime is 1421243. The reversal of 1421242 is 2421241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2421241 = 139 ⋅17419.

It can be written as a sum of positive squares in only one way, i.e., 1083681 + 337561 = 1041^2 + 581^2 .

It is not an unprimeable number, because it can be changed into a prime (1421243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355309 + ... + 355312.

2^1421242 is an apocalyptic number.

1421242 is a deficient number, since it is larger than the sum of its proper divisors (710624).

1421242 is an equidigital number, since it uses as much as digits as its factorization.

1421242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710623.

The product of its digits is 128, while the sum is 16.

The square root of 1421242 is about 1192.1585465029. The cubic root of 1421242 is about 112.4318467865.

Adding to 1421242 its reverse (2421241), we get a palindrome (3842483).

Subtracting 1421242 from its reverse (2421241), we obtain a palindrome (999999).

The spelling of 1421242 in words is "one million, four hundred twenty-one thousand, two hundred forty-two".