12270157 has 2 divisors, whose sum is σ = 12270158. Its totient is φ = 12270156.

The previous prime is 12270133. The next prime is 12270169. The reversal of 12270157 is 75107221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12033961 + 236196 = 3469^2 + 486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12270157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12270197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6135078 + 6135079.

It is an arithmetic number, because the mean of its divisors is an integer number (6135079).

Almost surely, 2^12270157 is an apocalyptic number.

It is an amenable number.

12270157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12270157 is an equidigital number, since it uses as much as digits as its factorization.

12270157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 12270157 is about 3502.8783878405. The cubic root of 12270157 is about 230.6481841789.

Adding to 12270157 its reverse (75107221), we get a palindrome (87377378).

The spelling of 12270157 in words is "twelve million, two hundred seventy thousand, one hundred fifty-seven".