142421131 has 4 divisors (see below), whose sum is σ = 149917000. Its totient is φ = 134925264.

The previous prime is 142421113. The next prime is 142421143. The reversal of 142421131 is 131124241.

142421131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142421131 - 2¹¹ = 142419083 is a prime.

It is a super-2 number, since 2×142421131² = 40567557110638322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 7495849 = 142421131 / (1 + 4 + 2 + 4 + 2 + 1 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142421099 and 142421108.

It is not an unprimeable number, because it can be changed into a prime (142421831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3747906 + ... + 3747943.

It is an arithmetic number, because the mean of its divisors is an integer number (37479250).

Almost surely, 2^142421131 is an apocalyptic number.

142421131 is a deficient number, since it is larger than the sum of its proper divisors (7495869).

142421131 is an equidigital number, since it uses as much as digits as its factorization.

142421131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7495868.

The product of its digits is 192, while the sum is 19.

The square root of 142421131 is about 11934.0324702089. The cubic root of 142421131 is about 522.2255830292.

Adding to 142421131 its reverse (131124241), we get a palindrome (273545372).

The spelling of 142421131 in words is "one hundred forty-two million, four hundred twenty-one thousand, one hundred thirty-one".