142209556 has 12 divisors (see below), whose sum is σ = 263506068. Its totient is φ = 66922112.

The previous prime is 142209497. The next prime is 142209563. The reversal of 142209556 is 655902241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 100400400 + 41809156 = 10020^2 + 6466^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045591 + ... + 1045726.

It is an arithmetic number, because the mean of its divisors is an integer number (21958839).

Almost surely, 2^142209556 is an apocalyptic number.

It is an amenable number.

142209556 is a deficient number, since it is larger than the sum of its proper divisors (121296512).

142209556 is a wasteful number, since it uses less digits than its factorization.

142209556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091338 (or 2091336 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 142209556 is about 11925.1648206639. The cubic root of 142209556 is about 521.9668558885.

The spelling of 142209556 in words is "one hundred forty-two million, two hundred nine thousand, five hundred fifty-six".