142231340 has 24 divisors (see below), whose sum is σ = 314406960. Its totient is φ = 53898048.

The previous prime is 142231339. The next prime is 142231343. The reversal of 142231340 is 43132241.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (142231343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186767 + ... + 187526.

It is an arithmetic number, because the mean of its divisors is an integer number (13100290).

Almost surely, 2^142231340 is an apocalyptic number.

142231340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142231340 is an abundant number, since it is smaller than the sum of its proper divisors (172175620).

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

142231340 is a wasteful number, since it uses less digits than its factorization.

142231340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374321 (or 374319 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 142231340 is about 11926.0781483269. The cubic root of 142231340 is about 521.9935065716.

Adding to 142231340 its reverse (43132241), we get a palindrome (185363581).

Subtracting from 142231340 its reverse (43132241), we obtain a palindrome (99099099).

The spelling of 142231340 in words is "one hundred forty-two million, two hundred thirty-one thousand, three hundred forty".