2161602 has 48 divisors (see below), whose sum is σ = 5012280. Its totient is φ = 672000.

The previous prime is 2161591. The next prime is 2161613. The reversal of 2161602 is 2061612.

It is a happy number.

2161602 is a `hidden beast` number, since 2 + 1 + 61 + 602 = 666.

2161602 is nontrivially palindromic in base 4.

2161602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2161591) and next prime (2161613).

It can be written as a sum of positive squares in 4 ways, for example, as 1879641 + 281961 = 1371^2 + 531^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 21352 + ... + 21452.

2^2161602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2506140).

2161602 is an abundant number, since it is smaller than the sum of its proper divisors (2850678).

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

2161602 is a wasteful number, since it uses less digits than its factorization.

2161602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2161602 is about 1470.2387561209. The cubic root of 2161602 is about 129.2980309525.

It can be divided in two parts, 2 and 161602, that added together give a square (161604 = 402²).

The spelling of 2161602 in words is "two million, one hundred sixty-one thousand, six hundred two".