142121484 has 72 divisors (see below), whose sum is σ = 372922368. Its totient is φ = 45588960.

The previous prime is 142121459. The next prime is 142121491. The reversal of 142121484 is 484121241.

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 23 ways as a sum of consecutive naturals, for example, 387069 + ... + 387435.

Almost surely, 2^142121484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142121484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186461184).

142121484 is an abundant number, since it is smaller than the sum of its proper divisors (230800884).

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

142121484 is a wasteful number, since it uses less digits than its factorization.

142121484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 750 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 142121484 is about 11921.4715534618. The cubic root of 142121484 is about 521.8590802941.

The spelling of 142121484 in words is "one hundred forty-two million, one hundred twenty-one thousand, four hundred eighty-four".