142244421 has 32 divisors (see below), whose sum is σ = 212502528. Its totient is φ = 83903040.

The previous prime is 142244411. The next prime is 142244483. The reversal of 142244421 is 124442241.

142244421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142244421 - 2⁶ = 142244357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142244391 and 142244400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142244411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291840 + ... + 292326.

It is an arithmetic number, because the mean of its divisors is an integer number (6640704).

Almost surely, 2^142244421 is an apocalyptic number.

142244421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142244421 is a deficient number, since it is larger than the sum of its proper divisors (70258107).

142244421 is a wasteful number, since it uses less digits than its factorization.

142244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its digits is 2048, while the sum is 24.

The square root of 142244421 is about 11926.6265557365. The cubic root of 142244421 is about 522.0095086420.

Adding to 142244421 its reverse (124442241), we get a palindrome (266686662).

The spelling of 142244421 in words is "one hundred forty-two million, two hundred forty-four thousand, four hundred twenty-one".