1421111142 has 56 divisors (see below), whose sum is σ = 3486626280. Its totient is φ = 430634880.

The previous prime is 1421111123. The next prime is 1421111173. The reversal of 1421111142 is 2411111241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 28267 + ... + 60342.

Almost surely, 2^1421111142 is an apocalyptic number.

1421111142 is an abundant number, since it is smaller than the sum of its proper divisors (2065515138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421111142 is an equidigital number, since it uses as much as digits as its factorization.

1421111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88640 (or 88625 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 1421111142 is about 37697.6278033512. The cubic root of 1421111142 is about 1124.2839603520.

Adding to 1421111142 its reverse (2411111241), we get a palindrome (3832222383).

Subtracting 1421111142 from its reverse (2411111241), we obtain a palindrome (990000099).

The spelling of 1421111142 in words is "one billion, four hundred twenty-one million, one hundred eleven thousand, one hundred forty-two".