1380241157 has 2 divisors, whose sum is σ = 1380241158. Its totient is φ = 1380241156.

The previous prime is 1380241147. The next prime is 1380241183. The reversal of 1380241157 is 7511420831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1139805121 + 240436036 = 33761^2 + 15506^2 .

It is an emirp because it is prime and its reverse (7511420831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380241157 - 2²² = 1376046853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380241147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690120578 + 690120579.

It is an arithmetic number, because the mean of its divisors is an integer number (690120579).

Almost surely, 2^1380241157 is an apocalyptic number.

It is an amenable number.

1380241157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380241157 is an equidigital number, since it uses as much as digits as its factorization.

1380241157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1380241157 is about 37151.5969643298. The cubic root of 1380241157 is about 1113.4011301199.

Adding to 1380241157 its reverse (7511420831), we get a palindrome (8891661988).

The spelling of 1380241157 in words is "one billion, three hundred eighty million, two hundred forty-one thousand, one hundred fifty-seven".