142154569 has 2 divisors, whose sum is σ = 142154570. Its totient is φ = 142154568.

The previous prime is 142154557. The next prime is 142154581. The reversal of 142154569 is 965451241.

It is a balanced prime because it is at equal distance from previous prime (142154557) and next prime (142154581).

It can be written as a sum of positive squares in only one way, i.e., 102313225 + 39841344 = 10115^2 + 6312^2 .

It is an emirp because it is prime and its reverse (965451241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142154569 is a prime.

It is a super-2 number, since 2×142154569² = 40415842975151522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142154539) 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, 71077284 + 71077285.

It is an arithmetic number, because the mean of its divisors is an integer number (71077285).

Almost surely, 2^142154569 is an apocalyptic number.

It is an amenable number.

142154569 is a deficient number, since it is larger than the sum of its proper divisors (1).

142154569 is an equidigital number, since it uses as much as digits as its factorization.

142154569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 142154569 is about 11922.8590950325. The cubic root of 142154569 is about 521.8995723379.

The spelling of 142154569 in words is "one hundred forty-two million, one hundred fifty-four thousand, five hundred sixty-nine".