142625669 has 2 divisors, whose sum is σ = 142625670. Its totient is φ = 142625668.

The previous prime is 142625663. The next prime is 142625687. The reversal of 142625669 is 966526241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129390625 + 13235044 = 11375^2 + 3638^2 .

It is an emirp because it is prime and its reverse (966526241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142625669 - 2⁴ = 142625653 is a prime.

It is a super-2 number, since 2×142625669² = 40684162915395122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142625663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71312834 + 71312835.

It is an arithmetic number, because the mean of its divisors is an integer number (71312835).

Almost surely, 2^142625669 is an apocalyptic number.

It is an amenable number.

142625669 is a deficient number, since it is larger than the sum of its proper divisors (1).

142625669 is an equidigital number, since it uses as much as digits as its factorization.

142625669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 142625669 is about 11942.5989215078. The cubic root of 142625669 is about 522.4754614057.

The spelling of 142625669 in words is "one hundred forty-two million, six hundred twenty-five thousand, six hundred sixty-nine".