1230542557 has 2 divisors, whose sum is σ = 1230542558. Its totient is φ = 1230542556.

The previous prime is 1230542519. The next prime is 1230542563. The reversal of 1230542557 is 7552450321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 805935321 + 424607236 = 28389^2 + 20606^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230542557 - 2¹⁵ = 1230509789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230542507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615271278 + 615271279.

It is an arithmetic number, because the mean of its divisors is an integer number (615271279).

Almost surely, 2^1230542557 is an apocalyptic number.

It is an amenable number.

1230542557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230542557 is an equidigital number, since it uses as much as digits as its factorization.

1230542557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 1230542557 is about 35079.0900252558. The cubic root of 1230542557 is about 1071.5987852756.

Adding to 1230542557 its reverse (7552450321), we get a palindrome (8782992878).

The spelling of 1230542557 in words is "one billion, two hundred thirty million, five hundred forty-two thousand, five hundred fifty-seven".