142019161 has 2 divisors, whose sum is σ = 142019162. Its totient is φ = 142019160.

The previous prime is 142019123. The next prime is 142019179. The reversal of 142019161 is 161910241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101123136 + 40896025 = 10056^2 + 6395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142019161 is a prime.

It is a super-2 number, since 2×142019161² = 40338884182287842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142019461) 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, 71009580 + 71009581.

It is an arithmetic number, because the mean of its divisors is an integer number (71009581).

Almost surely, 2^142019161 is an apocalyptic number.

It is an amenable number.

142019161 is a deficient number, since it is larger than the sum of its proper divisors (1).

142019161 is an equidigital number, since it uses as much as digits as its factorization.

142019161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 142019161 is about 11917.1792383936. The cubic root of 142019161 is about 521.7338095157.

The spelling of 142019161 in words is "one hundred forty-two million, nineteen thousand, one hundred sixty-one".