142245401220 has 144 divisors (see below), whose sum is σ = 471034195632. Its totient is φ = 34534563840.

The previous prime is 142245401131. The next prime is 142245401227. The reversal of 142245401220 is 22104542241.

It is a happy number.

142245401220 is a `hidden beast` number, since 14 + 2 + 24 + 5 + 401 + 220 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 15954721344 + 126290679876 = 126312^2 + 355374^2 .

It is not an unprimeable number, because it can be changed into a prime (142245401227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 245541 + ... + 587180.

It is an arithmetic number, because the mean of its divisors is an integer number (3271070803).

Almost surely, 2^142245401220 is an apocalyptic number.

142245401220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142245401220 is an abundant number, since it is smaller than the sum of its proper divisors (328788794412).

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

142245401220 is a wasteful number, since it uses less digits than its factorization.

142245401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832822 (or 832817 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 142245401220 its reverse (22104542241), we get a palindrome (164349943461).

The spelling of 142245401220 in words is "one hundred forty-two billion, two hundred forty-five million, four hundred one thousand, two hundred twenty".