142047121 has 4 divisors (see below), whose sum is σ = 150402852. Its totient is φ = 133691392.

The previous prime is 142047071. The next prime is 142047127. The reversal of 142047121 is 121740241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104837121 + 37210000 = 10239^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 142047121 - 2¹⁹ = 141522833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142047092 and 142047101.

It is not an unprimeable number, because it can be changed into a prime (142047127) 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, 4177840 + ... + 4177873.

It is an arithmetic number, because the mean of its divisors is an integer number (37600713).

Almost surely, 2^142047121 is an apocalyptic number.

It is an amenable number.

142047121 is a deficient number, since it is larger than the sum of its proper divisors (8355731).

142047121 is an equidigital number, since it uses as much as digits as its factorization.

142047121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355730.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 142047121 is about 11918.3522770558. The cubic root of 142047121 is about 521.7680460229.

Adding to 142047121 its reverse (121740241), we get a palindrome (263787362).

The spelling of 142047121 in words is "one hundred forty-two million, forty-seven thousand, one hundred twenty-one".