142043440 has 80 divisors (see below), whose sum is σ = 411759360. Its totient is φ = 44271360.

The previous prime is 142043437. The next prime is 142043467. The reversal of 142043440 is 44340241.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5370 + ... + 17689.

It is an arithmetic number, because the mean of its divisors is an integer number (5146992).

Almost surely, 2^142043440 is an apocalyptic number.

142043440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142043440 is an abundant number, since it is smaller than the sum of its proper divisors (269715920).

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

142043440 is a wasteful number, since it uses less digits than its factorization.

142043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23090 (or 23084 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 142043440 is about 11918.1978503463. The cubic root of 142043440 is about 521.7635389627.

Adding to 142043440 its reverse (44340241), we get a palindrome (186383681).

The spelling of 142043440 in words is "one hundred forty-two million, forty-three thousand, four hundred forty".