2129139 has 8 divisors (see below), whose sum is σ = 3154320. Its totient is φ = 1419408.

The previous prime is 2129123. The next prime is 2129161. The reversal of 2129139 is 9319212.

It is not a de Polignac number, because 2129139 - 2⁴ = 2129123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 78857 = 2129139 / (2 + 1 + 2 + 9 + 1 + 3 + 9).

2129139 is a lucky number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2129119) 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, 39402 + ... + 39455.

It is an arithmetic number, because the mean of its divisors is an integer number (394290).

2^2129139 is an apocalyptic number.

2129139 is a deficient number, since it is larger than the sum of its proper divisors (1025181).

2129139 is an equidigital number, since it uses as much as digits as its factorization.

2129139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78866 (or 78860 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 2129139 is about 1459.1569483781. The cubic root of 2129139 is about 128.6474962565.

The spelling of 2129139 in words is "two million, one hundred twenty-nine thousand, one hundred thirty-nine".