142184869 has 2 divisors, whose sum is σ = 142184870. Its totient is φ = 142184868.

The previous prime is 142184863. The next prime is 142184897. The reversal of 142184869 is 968481241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120450625 + 21734244 = 10975^2 + 4662^2 .

It is a cyclic number.

It is not a de Polignac number, because 142184869 - 2¹⁷ = 142053797 is a prime.

It is a super-2 number, since 2×142184869² = 40433073945094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142184863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71092434 + 71092435.

It is an arithmetic number, because the mean of its divisors is an integer number (71092435).

Almost surely, 2^142184869 is an apocalyptic number.

It is an amenable number.

142184869 is a deficient number, since it is larger than the sum of its proper divisors (1).

142184869 is an equidigital number, since it uses as much as digits as its factorization.

142184869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 142184869 is about 11924.1296957053. The cubic root of 142184869 is about 521.9366503668.

The spelling of 142184869 in words is "one hundred forty-two million, one hundred eighty-four thousand, eight hundred sixty-nine".