142240021434 has 128 divisors (see below), whose sum is σ = 381494292480. Its totient is φ = 38404504512.

The previous prime is 142240021349. The next prime is 142240021477. The reversal of 142240021434 is 434120042241.

142240021434 is a `hidden beast` number, since 1 + 4 + 224 + 0 + 0 + 2 + 1 + 434 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 142240021398 and 142240021407.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 623044 + ... + 820160.

It is an arithmetic number, because the mean of its divisors is an integer number (2980424160).

Almost surely, 2^142240021434 is an apocalyptic number.

142240021434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142240021434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190747146240).

142240021434 is an abundant number, since it is smaller than the sum of its proper divisors (239254271046).

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

142240021434 is a wasteful number, since it uses less digits than its factorization.

142240021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197241 (or 197235 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 142240021434 its reverse (434120042241), we get a palindrome (576360063675).

The spelling of 142240021434 in words is "one hundred forty-two billion, two hundred forty million, twenty-one thousand, four hundred thirty-four".