1442120421 has 48 divisors (see below), whose sum is σ = 2408719680. Its totient is φ = 762370560.

The previous prime is 1442120417. The next prime is 1442120423. The reversal of 1442120421 is 1240212441.

It is not a de Polignac number, because 1442120421 - 2² = 1442120417 is a prime.

It is a super-2 number, since 2×1442120421² = 4159422617330434482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442120423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142551 + ... + 152331.

It is an arithmetic number, because the mean of its divisors is an integer number (50181660).

Almost surely, 2^1442120421 is an apocalyptic number.

It is an amenable number.

1442120421 is a deficient number, since it is larger than the sum of its proper divisors (966599259).

1442120421 is a wasteful number, since it uses less digits than its factorization.

1442120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9874 (or 9867 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1442120421 is about 37975.2606442668. The cubic root of 1442120421 is about 1129.7972385303.

Adding to 1442120421 its reverse (1240212441), we get a palindrome (2682332862).

The spelling of 1442120421 in words is "one billion, four hundred forty-two million, one hundred twenty thousand, four hundred twenty-one".