142201009 has 2 divisors, whose sum is σ = 142201010. Its totient is φ = 142201008.

The previous prime is 142200979. The next prime is 142201069. The reversal of 142201009 is 900102241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140351409 + 1849600 = 11847^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 142201009 - 2¹⁷ = 142069937 is a prime.

It is a super-2 number, since 2×142201009² = 40442253921236162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142201069) 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, 71100504 + 71100505.

It is an arithmetic number, because the mean of its divisors is an integer number (71100505).

Almost surely, 2^142201009 is an apocalyptic number.

It is an amenable number.

142201009 is a deficient number, since it is larger than the sum of its proper divisors (1).

142201009 is an equidigital number, since it uses as much as digits as its factorization.

142201009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 142201009 is about 11924.8064554524. The cubic root of 142201009 is about 521.9563986913.

The spelling of 142201009 in words is "one hundred forty-two million, two hundred one thousand, nine".