142770971 has 4 divisors (see below), whose sum is σ = 163166832. Its totient is φ = 122375112.

The previous prime is 142770967. The next prime is 142770977. The reversal of 142770971 is 179077241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142770971 - 2² = 142770967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142770977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10197920 + ... + 10197933.

It is an arithmetic number, because the mean of its divisors is an integer number (40791708).

Almost surely, 2^142770971 is an apocalyptic number.

142770971 is a deficient number, since it is larger than the sum of its proper divisors (20395861).

142770971 is an equidigital number, since it uses as much as digits as its factorization.

142770971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20395860.

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 142770971 is about 11948.6807221551. The cubic root of 142770971 is about 522.6528277105.

The spelling of 142770971 in words is "one hundred forty-two million, seven hundred seventy thousand, nine hundred seventy-one".