146138971 has 4 divisors (see below), whose sum is σ = 159424344. Its totient is φ = 132853600.

The previous prime is 146138963. The next prime is 146138999. The reversal of 146138971 is 179831641.

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

It is not a de Polignac number, because 146138971 - 2³ = 146138963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146138911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6642670 + ... + 6642691.

It is an arithmetic number, because the mean of its divisors is an integer number (39856086).

Almost surely, 2^146138971 is an apocalyptic number.

146138971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

146138971 is a deficient number, since it is larger than the sum of its proper divisors (13285373).

146138971 is a wasteful number, since it uses less digits than its factorization.

146138971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13285372.

The product of its digits is 36288, while the sum is 40.

The square root of 146138971 is about 12088.7952666922. The cubic root of 146138971 is about 526.7307608175.

The spelling of 146138971 in words is "one hundred forty-six million, one hundred thirty-eight thousand, nine hundred seventy-one".