142521132 has 96 divisors (see below), whose sum is σ = 385850304. Its totient is φ = 40550400.

The previous prime is 142521121. The next prime is 142521139. The reversal of 142521132 is 231125241.

It is a super-2 number, since 2×142521132² = 40624546133122848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142521099 and 142521108.

It is not an unprimeable number, because it can be changed into a prime (142521139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161332 + ... + 162212.

It is an arithmetic number, because the mean of its divisors is an integer number (4019274).

Almost surely, 2^142521132 is an apocalyptic number.

142521132 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 142521132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192925152).

142521132 is an abundant number, since it is smaller than the sum of its proper divisors (243329172).

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

142521132 is a wasteful number, since it uses less digits than its factorization.

142521132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 977 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 142521132 is about 11938.2214755800. The cubic root of 142521132 is about 522.3477813344.

Adding to 142521132 its reverse (231125241), we get a palindrome (373646373).

The spelling of 142521132 in words is "one hundred forty-two million, five hundred twenty-one thousand, one hundred thirty-two".