1659138 has 32 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 502656.

The previous prime is 1659131. The next prime is 1659169. The reversal of 1659138 is 8319561.

It is a nialpdrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1659099 and 1659108.

It is not an unprimeable number, because it can be changed into a prime (1659131) 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 15 ways as a sum of consecutive naturals, for example, 6823 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2^1659138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1659138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400).

1659138 is an abundant number, since it is smaller than the sum of its proper divisors (1969662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1659138 is a wasteful number, since it uses less digits than its factorization.

1659138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its digits is 6480, while the sum is 33.

The square root of 1659138 is about 1288.0753083574. The cubic root of 1659138 is about 118.3843162358.

The spelling of 1659138 in words is "one million, six hundred fifty-nine thousand, one hundred thirty-eight".