142778120 has 16 divisors (see below), whose sum is σ = 321250860. Its totient is φ = 57111232.

The previous prime is 142778101. The next prime is 142778123. The reversal of 142778120 is 21877241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 129367876 + 13410244 = 11374^2 + 3662^2 .

It is not an unprimeable number, because it can be changed into a prime (142778123) 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, 1784687 + ... + 1784766.

Almost surely, 2^142778120 is an apocalyptic number.

142778120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142778120 is an abundant number, since it is smaller than the sum of its proper divisors (178472740).

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

142778120 is a wasteful number, since it uses less digits than its factorization.

142778120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569464 (or 3569460 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 142778120 is about 11948.9798727758. The cubic root of 142778120 is about 522.6615511988.

The spelling of 142778120 in words is "one hundred forty-two million, seven hundred seventy-eight thousand, one hundred twenty".