142402340 has 48 divisors (see below), whose sum is σ = 316249920. Its totient is φ = 53712000.

The previous prime is 142402333. The next prime is 142402373. The reversal of 142402340 is 43204241.

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

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, 94634 + ... + 96126.

It is an arithmetic number, because the mean of its divisors is an integer number (6588540).

Almost surely, 2^142402340 is an apocalyptic number.

142402340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142402340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158124960).

142402340 is an abundant number, since it is smaller than the sum of its proper divisors (173847580).

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

142402340 is a wasteful number, since it uses less digits than its factorization.

142402340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 142402340 is about 11933.2451579610. The cubic root of 142402340 is about 522.2026145917.

Adding to 142402340 its reverse (43204241), we get a palindrome (185606581).

The spelling of 142402340 in words is "one hundred forty-two million, four hundred two thousand, three hundred forty".