1421436442 has 4 divisors (see below), whose sum is σ = 2132154666. Its totient is φ = 710718220.

The previous prime is 1421436407. The next prime is 1421436469. The reversal of 1421436442 is 2446341241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2446341241 = 10007 ⋅244463.

It can be written as a sum of positive squares in only one way, i.e., 1421214601 + 221841 = 37699^2 + 471^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355359109 + ... + 355359112.

Almost surely, 2^1421436442 is an apocalyptic number.

1421436442 is a deficient number, since it is larger than the sum of its proper divisors (710718224).

1421436442 is an equidigital number, since it uses as much as digits as its factorization.

1421436442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710718223.

The product of its digits is 18432, while the sum is 31.

The square root of 1421436442 is about 37701.9421515656. The cubic root of 1421436442 is about 1124.3697386934.

Adding to 1421436442 its reverse (2446341241), we get a palindrome (3867777683).

The spelling of 1421436442 in words is "one billion, four hundred twenty-one million, four hundred thirty-six thousand, four hundred forty-two".