142012321 has 8 divisors (see below), whose sum is σ = 155009088. Its totient is φ = 129030000.

The previous prime is 142012307. The next prime is 142012349. The reversal of 142012321 is 123210241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142012321 - 2¹¹ = 142010273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142012295 and 142012304.

It is not an unprimeable number, because it can be changed into a prime (142012301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34356 + ... + 38266.

It is an arithmetic number, because the mean of its divisors is an integer number (19376136).

Almost surely, 2^142012321 is an apocalyptic number.

142012321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142012321 is a deficient number, since it is larger than the sum of its proper divisors (12996767).

142012321 is a wasteful number, since it uses less digits than its factorization.

142012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 142012321 is about 11916.8922542750. The cubic root of 142012321 is about 521.7254333770.

Adding to 142012321 its reverse (123210241), we get a palindrome (265222562).

The spelling of 142012321 in words is "one hundred forty-two million, twelve thousand, three hundred twenty-one".