12020157 has 20 divisors (see below), whose sum is σ = 18539136. Its totient is φ = 7753320.

The previous prime is 12020137. The next prime is 12020161. The reversal of 12020157 is 75102021.

It is a de Polignac number, because none of the positive numbers 2^k-12020157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 118 + ... + 4904.

Almost surely, 2^12020157 is an apocalyptic number.

It is an amenable number.

12020157 is a deficient number, since it is larger than the sum of its proper divisors (6518979).

12020157 is an equidigital number, since it uses as much as digits as its factorization.

12020157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830 (or 4821 counting only the distinct ones).

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

The square root of 12020157 is about 3467.0098067355. The cubic root of 12020157 is about 229.0709657191.

Adding to 12020157 its reverse (75102021), we get a palindrome (87122178).

The spelling of 12020157 in words is "twelve million, twenty thousand, one hundred fifty-seven".