142420340 has 48 divisors (see below), whose sum is σ = 308109312. Its totient is φ = 55270656.

The previous prime is 142420319. The next prime is 142420349. The reversal of 142420340 is 43024241.

142420340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142420349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118784 + ... + 119976.

It is an arithmetic number, because the mean of its divisors is an integer number (6418944).

Almost surely, 2^142420340 is an apocalyptic number.

142420340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142420340 is an abundant number, since it is smaller than the sum of its proper divisors (165688972).

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

142420340 is a wasteful number, since it uses less digits than its factorization.

142420340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1374 counting only the distinct ones).

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

The square root of 142420340 is about 11933.9993296464. Note that the first 3 decimals coincide. The cubic root of 142420340 is about 522.2246162223.

Adding to 142420340 its reverse (43024241), we get a palindrome (185444581).

The spelling of 142420340 in words is "one hundred forty-two million, four hundred twenty thousand, three hundred forty".