2002156 has 24 divisors (see below), whose sum is σ = 3814160. Its totient is φ = 914112.

The previous prime is 2002151. The next prime is 2002157. The reversal of 2002156 is 6512002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2002151) 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, 7090 + ... + 7366.

2^2002156 is an apocalyptic number.

2002156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2002156 is a deficient number, since it is larger than the sum of its proper divisors (1812004).

2002156 is a wasteful number, since it uses less digits than its factorization.

2002156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2002156 is about 1414.9756181645. The cubic root of 2002156 is about 126.0373618941.

Adding to 2002156 its reverse (6512002), we get a palindrome (8514158).

The spelling of 2002156 in words is "two million, two thousand, one hundred fifty-six".