142120436 has 6 divisors (see below), whose sum is σ = 248710770. Its totient is φ = 71060216.

The previous prime is 142120421. The next prime is 142120457. The reversal of 142120436 is 634021241.

142120436 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 111936400 + 30184036 = 10580^2 + 5494^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17765051 + ... + 17765058.

It is an arithmetic number, because the mean of its divisors is an integer number (41451795).

Almost surely, 2^142120436 is an apocalyptic number.

It is an amenable number.

142120436 is a deficient number, since it is larger than the sum of its proper divisors (106590334).

142120436 is a wasteful number, since it uses less digits than its factorization.

142120436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35530113 (or 35530111 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 142120436 is about 11921.4275990755. The cubic root of 142120436 is about 521.8577975660.

Adding to 142120436 its reverse (634021241), we get a palindrome (776141677).

The spelling of 142120436 in words is "one hundred forty-two million, one hundred twenty thousand, four hundred thirty-six".