1421738 has 8 divisors (see below), whose sum is σ = 2137860. Its totient is φ = 709120.

The previous prime is 1421737. The next prime is 1421741. The reversal of 1421738 is 8371241.

It can be written as a sum of positive squares in 2 ways, for example, as 1408969 + 12769 = 1187^2 + 113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1421731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728 + ... + 1836.

2^1421738 is an apocalyptic number.

1421738 is a deficient number, since it is larger than the sum of its proper divisors (716122).

1421738 is a wasteful number, since it uses less digits than its factorization.

1421738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752.

The product of its digits is 1344, while the sum is 26.

The square root of 1421738 is about 1192.3665543783. The cubic root of 1421738 is about 112.4449244819. Note that the first 3 decimals are identical.

Adding to 1421738 its reverse (8371241), we get a palindrome (9792979).

The spelling of 1421738 in words is "one million, four hundred twenty-one thousand, seven hundred thirty-eight".