142242251440 has 20 divisors (see below), whose sum is σ = 330713234784. Its totient is φ = 56896900544.

The previous prime is 142242251321. The next prime is 142242251449. The reversal of 142242251440 is 44152242241.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (142242251449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889013992 + ... + 889014151.

Almost surely, 2^142242251440 is an apocalyptic number.

142242251440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142242251440 is an abundant number, since it is smaller than the sum of its proper divisors (188470983344).

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

142242251440 is a wasteful number, since it uses less digits than its factorization.

142242251440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778028156 (or 1778028150 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

Adding to 142242251440 its reverse (44152242241), we get a palindrome (186394493681).

The spelling of 142242251440 in words is "one hundred forty-two billion, two hundred forty-two million, two hundred fifty-one thousand, four hundred forty".