1260543157 has 2 divisors, whose sum is σ = 1260543158. Its totient is φ = 1260543156.

The previous prime is 1260543143. The next prime is 1260543181. The reversal of 1260543157 is 7513450621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1078859716 + 181683441 = 32846^2 + 13479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1260543157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260547157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630271578 + 630271579.

It is an arithmetic number, because the mean of its divisors is an integer number (630271579).

Almost surely, 2^1260543157 is an apocalyptic number.

It is an amenable number.

1260543157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260543157 is an equidigital number, since it uses as much as digits as its factorization.

1260543157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 1260543157 is about 35504.1287317405. The cubic root of 1260543157 is about 1080.2374754996.

Adding to 1260543157 its reverse (7513450621), we get a palindrome (8773993778).

The spelling of 1260543157 in words is "one billion, two hundred sixty million, five hundred forty-three thousand, one hundred fifty-seven".