1233140257 has 2 divisors, whose sum is σ = 1233140258. Its totient is φ = 1233140256.

The previous prime is 1233140189. The next prime is 1233140273. The reversal of 1233140257 is 7520413321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 890186896 + 342953361 = 29836^2 + 18519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1233140257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1233140287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616570128 + 616570129.

It is an arithmetic number, because the mean of its divisors is an integer number (616570129).

Almost surely, 2^1233140257 is an apocalyptic number.

It is an amenable number.

1233140257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233140257 is an equidigital number, since it uses as much as digits as its factorization.

1233140257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1233140257 is about 35116.0968360665. The cubic root of 1233140257 is about 1072.3523107924.

Adding to 1233140257 its reverse (7520413321), we get a palindrome (8753553578).

The spelling of 1233140257 in words is "one billion, two hundred thirty-three million, one hundred forty thousand, two hundred fifty-seven".