142641893 has 2 divisors, whose sum is σ = 142641894. Its totient is φ = 142641892.

The previous prime is 142641887. The next prime is 142641931. The reversal of 142641893 is 398146241.

It is an a-pointer prime, because the next prime (142641931) can be obtained adding 142641893 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141086884 + 1555009 = 11878^2 + 1247^2 .

It is an emirp because it is prime and its reverse (398146241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142641893 - 2²⁰ = 141593317 is a prime.

It is a Sophie Germain 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 (142641803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71320946 + 71320947.

It is an arithmetic number, because the mean of its divisors is an integer number (71320947).

Almost surely, 2^142641893 is an apocalyptic number.

It is an amenable number.

142641893 is a deficient number, since it is larger than the sum of its proper divisors (1).

142641893 is an equidigital number, since it uses as much as digits as its factorization.

142641893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 142641893 is about 11943.2781513285. The cubic root of 142641893 is about 522.4952715856.

The spelling of 142641893 in words is "one hundred forty-two million, six hundred forty-one thousand, eight hundred ninety-three".