142021556 has 12 divisors (see below), whose sum is σ = 253227492. Its totient is φ = 69670848.

The previous prime is 142021543. The next prime is 142021567. The reversal of 142021556 is 655120241.

142021556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 92544400 + 49477156 = 9620^2 + 7034^2 .

It is a super-2 number, since 2×142021556² = 40340244737322272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334745 + ... + 335168.

It is an arithmetic number, because the mean of its divisors is an integer number (21102291).

Almost surely, 2^142021556 is an apocalyptic number.

It is an amenable number.

142021556 is a deficient number, since it is larger than the sum of its proper divisors (111205936).

142021556 is a wasteful number, since it uses less digits than its factorization.

142021556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669970 (or 669968 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 142021556 is about 11917.2797231583. The cubic root of 142021556 is about 521.7367423252.

Adding to 142021556 its reverse (655120241), we get a palindrome (797141797).

The spelling of 142021556 in words is "one hundred forty-two million, twenty-one thousand, five hundred fifty-six".