142120049 has 2 divisors, whose sum is σ = 142120050. Its totient is φ = 142120048.

The previous prime is 142120037. The next prime is 142120067. The reversal of 142120049 is 940021241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108014449 + 34105600 = 10393^2 + 5840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142120049 is a prime.

It is a Chen prime.

It is a zygodrome in base 7.

It is not a weakly prime, because it can be changed into another prime (142120079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71060024 + 71060025.

It is an arithmetic number, because the mean of its divisors is an integer number (71060025).

Almost surely, 2^142120049 is an apocalyptic number.

It is an amenable number.

142120049 is a deficient number, since it is larger than the sum of its proper divisors (1).

142120049 is an equidigital number, since it uses as much as digits as its factorization.

142120049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 142120049 is about 11921.4113677870. The cubic root of 142120049 is about 521.8573238853.

The spelling of 142120049 in words is "one hundred forty-two million, one hundred twenty thousand, forty-nine".