142921632 has 144 divisors (see below), whose sum is σ = 455740992. Its totient is φ = 39029760.

The previous prime is 142921631. The next prime is 142921661. The reversal of 142921632 is 236129241.

It is a self number, because there is not a number n which added to its sum of digits gives 142921632.

It is not an unprimeable number, because it can be changed into a prime (142921631) by changing a digit.

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, 107532 + ... + 108852.

It is an arithmetic number, because the mean of its divisors is an integer number (3164868).

Almost surely, 2^142921632 is an apocalyptic number.

142921632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142921632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227870496).

142921632 is an abundant number, since it is smaller than the sum of its proper divisors (312819360).

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

142921632 is a wasteful number, since it uses less digits than its factorization.

142921632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371 (or 1356 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 142921632 is about 11954.9835633513. The cubic root of 142921632 is about 522.8366085706.

The spelling of 142921632 in words is "one hundred forty-two million, nine hundred twenty-one thousand, six hundred thirty-two".