142011421 has 12 divisors (see below), whose sum is σ = 151368192. Its totient is φ = 133204928.

The previous prime is 142011349. The next prime is 142011437. The reversal of 142011421 is 124110241.

It is a happy number.

It is not a de Polignac number, because 142011421 - 2⁷ = 142011293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142011395 and 142011404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142011451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110046 + ... + 111328.

It is an arithmetic number, because the mean of its divisors is an integer number (12614016).

Almost surely, 2^142011421 is an apocalyptic number.

It is an amenable number.

142011421 is a deficient number, since it is larger than the sum of its proper divisors (9356771).

142011421 is a wasteful number, since it uses less digits than its factorization.

142011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700 (or 1683 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 142011421 is about 11916.8544926923. The cubic root of 142011421 is about 521.7243312335.

Adding to 142011421 its reverse (124110241), we get a palindrome (266121662).

The spelling of 142011421 in words is "one hundred forty-two million, eleven thousand, four hundred twenty-one".