146139 has 8 divisors (see below), whose sum is σ = 222720. Its totient is φ = 83496.

The previous prime is 146117. The next prime is 146141. The reversal of 146139 is 931641.

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

It is not a de Polignac number, because 146139 - 2⁷ = 146011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3459 + ... + 3500.

It is an arithmetic number, because the mean of its divisors is an integer number (27840).

2¹⁴⁶¹³⁹ is an apocalyptic number.

146139 is a deficient number, since it is larger than the sum of its proper divisors (76581).

146139 is an equidigital number, since it uses as much as digits as its factorization.

146139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969.

The product of its digits is 648, while the sum is 24.

The square root of 146139 is about 382.2813100323. The cubic root of 146139 is about 52.6730795659.

The spelling of 146139 in words is "one hundred forty-six thousand, one hundred thirty-nine".