142919971 has 8 divisors (see below), whose sum is σ = 144088704. Its totient is φ = 141755520.

The previous prime is 142919929. The next prime is 142919977. The reversal of 142919971 is 179919241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142919971 - 2²¹ = 140822819 is a prime.

It is a super-2 number, since 2×142919971² = 40852236221281682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142919977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104331 + ... + 105691.

It is an arithmetic number, because the mean of its divisors is an integer number (18011088).

Almost surely, 2^142919971 is an apocalyptic number.

142919971 is a deficient number, since it is larger than the sum of its proper divisors (1168733).

142919971 is a wasteful number, since it uses less digits than its factorization.

142919971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141.

The product of its digits is 40824, while the sum is 43.

The square root of 142919971 is about 11954.9140942125. The cubic root of 142919971 is about 522.8345831367.

The spelling of 142919971 in words is "one hundred forty-two million, nine hundred nineteen thousand, nine hundred seventy-one".