2138529 has 4 divisors (see below), whose sum is σ = 2851376. Its totient is φ = 1425684.

The previous prime is 2138527. The next prime is 2138531. The reversal of 2138529 is 9258312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2138527) and next prime (2138531).

It is not a de Polignac number, because 2138529 - 2¹ = 2138527 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2138496 and 2138505.

It is not an unprimeable number, because it can be changed into a prime (2138527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356419 + ... + 356424.

It is an arithmetic number, because the mean of its divisors is an integer number (712844).

2^2138529 is an apocalyptic number.

It is an amenable number.

2138529 is a deficient number, since it is larger than the sum of its proper divisors (712847).

2138529 is an equidigital number, since it uses as much as digits as its factorization.

2138529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712846.

The product of its digits is 4320, while the sum is 30.

The square root of 2138529 is about 1462.3710199536. The cubic root of 2138529 is about 128.8363407415.

The spelling of 2138529 in words is "two million, one hundred thirty-eight thousand, five hundred twenty-nine".