142837861 has 2 divisors, whose sum is σ = 142837862. Its totient is φ = 142837860.

The previous prime is 142837813. The next prime is 142837901. The reversal of 142837861 is 168738241.

It is an a-pointer prime, because the next prime (142837901) can be obtained adding 142837861 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86136961 + 56700900 = 9281^2 + 7530^2 .

It is a cyclic number.

It is not a de Polignac number, because 142837861 - 2⁷ = 142837733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142817861) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71418930 + 71418931.

It is an arithmetic number, because the mean of its divisors is an integer number (71418931).

Almost surely, 2^142837861 is an apocalyptic number.

It is an amenable number.

142837861 is a deficient number, since it is larger than the sum of its proper divisors (1).

142837861 is an equidigital number, since it uses as much as digits as its factorization.

142837861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 142837861 is about 11951.4794481687. The cubic root of 142837861 is about 522.7344381132.

The spelling of 142837861 in words is "one hundred forty-two million, eight hundred thirty-seven thousand, eight hundred sixty-one".