142823971 has 2 divisors, whose sum is σ = 142823972. Its totient is φ = 142823970.

The previous prime is 142823963. The next prime is 142823983. The reversal of 142823971 is 179328241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142823971 - 2³ = 142823963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142823971.

It is not a weakly prime, because it can be changed into another prime (143823971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71411985 + 71411986.

It is an arithmetic number, because the mean of its divisors is an integer number (71411986).

Almost surely, 2^142823971 is an apocalyptic number.

142823971 is a deficient number, since it is larger than the sum of its proper divisors (1).

142823971 is an equidigital number, since it uses as much as digits as its factorization.

142823971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 142823971 is about 11950.8983344349. The cubic root of 142823971 is about 522.7174934538.

The spelling of 142823971 in words is "one hundred forty-two million, eight hundred twenty-three thousand, nine hundred seventy-one".