142020100 has 18 divisors (see below), whose sum is σ = 308183834. Its totient is φ = 56808000.

The previous prime is 142020089. The next prime is 142020119. The reversal of 142020100 is 1020241.

It can be written as a sum of positive squares in 3 ways, for example, as 695556 + 141324544 = 834^2 + 11888^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 710001 + ... + 710200.

Almost surely, 2^142020100 is an apocalyptic number.

142020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142020100 is an abundant number, since it is smaller than the sum of its proper divisors (166163734).

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

142020100 is a wasteful number, since it uses less digits than its factorization.

142020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420215 (or 1420208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 142020100 is about 11917.2186352353. The cubic root of 142020100 is about 521.7349593769.

Adding to 142020100 its reverse (1020241), we get a palindrome (143040341).

The spelling of 142020100 in words is "one hundred forty-two million, twenty thousand, one hundred".