2148139 has 4 divisors (see below), whose sum is σ = 2455024. Its totient is φ = 1841256.

The previous prime is 2148127. The next prime is 2148149. The reversal of 2148139 is 9318412.

It is a happy number.

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 2148139 - 2⁷ = 2148011 is a prime.

It is a super-2 number, since 2×2148139² = 9229002326642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148149) 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, 153432 + ... + 153445.

It is an arithmetic number, because the mean of its divisors is an integer number (613756).

2^2148139 is an apocalyptic number.

2148139 is a deficient number, since it is larger than the sum of its proper divisors (306885).

2148139 is an equidigital number, since it uses as much as digits as its factorization.

2148139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306884.

The product of its digits is 1728, while the sum is 28.

The square root of 2148139 is about 1465.6530967456. The cubic root of 2148139 is about 129.0290381918.

The spelling of 2148139 in words is "two million, one hundred forty-eight thousand, one hundred thirty-nine".