12002157 has 12 divisors (see below), whose sum is σ = 17407260. Its totient is φ = 7968768.

The previous prime is 12002147. The next prime is 12002161. The reversal of 12002157 is 75120021.

It can be written as a sum of positive squares in 2 ways, for example, as 10949481 + 1052676 = 3309^2 + 1026^2 .

It is not a de Polignac number, because 12002157 - 2⁶ = 12002093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282 + ... + 4907.

It is an arithmetic number, because the mean of its divisors is an integer number (1450605).

Almost surely, 2^12002157 is an apocalyptic number.

It is an amenable number.

12002157 is a deficient number, since it is larger than the sum of its proper divisors (5405103).

12002157 is a wasteful number, since it uses less digits than its factorization.

12002157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452 (or 5449 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 12002157 is about 3464.4129372810. The cubic root of 12002157 is about 228.9565651812.

Adding to 12002157 its reverse (75120021), we get a palindrome (87122178).

The spelling of 12002157 in words is "twelve million, two thousand, one hundred fifty-seven".