142058921 has 4 divisors (see below), whose sum is σ = 144739332. Its totient is φ = 139378512.

The previous prime is 142058909. The next prime is 142058927. The reversal of 142058921 is 129850241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129850241 = 313 ⋅414857.

It can be written as a sum of positive squares in 2 ways, for example, as 121000000 + 21058921 = 11000^2 + 4589^2 .

It is a cyclic number.

It is not a de Polignac number, because 142058921 - 2¹⁰ = 142057897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142058927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340126 + ... + 1340231.

It is an arithmetic number, because the mean of its divisors is an integer number (36184833).

Almost surely, 2^142058921 is an apocalyptic number.

It is an amenable number.

142058921 is a deficient number, since it is larger than the sum of its proper divisors (2680411).

142058921 is an equidigital number, since it uses as much as digits as its factorization.

142058921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680410.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 142058921 is about 11918.8473016479. The cubic root of 142058921 is about 521.7824935584.

The spelling of 142058921 in words is "one hundred forty-two million, fifty-eight thousand, nine hundred twenty-one".