1154231257 has 2 divisors, whose sum is σ = 1154231258. Its totient is φ = 1154231256.

The previous prime is 1154231249. The next prime is 1154231263. The reversal of 1154231257 is 7521324511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020227481 + 134003776 = 31941^2 + 11576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154231257 - 2³ = 1154231249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154231207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577115628 + 577115629.

It is an arithmetic number, because the mean of its divisors is an integer number (577115629).

Almost surely, 2^1154231257 is an apocalyptic number.

It is an amenable number.

1154231257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154231257 is an equidigital number, since it uses as much as digits as its factorization.

1154231257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 1154231257 is about 33973.9791163767. The cubic root of 1154231257 is about 1048.9729206875.

Adding to 1154231257 its reverse (7521324511), we get a palindrome (8675555768).

The spelling of 1154231257 in words is "one billion, one hundred fifty-four million, two hundred thirty-one thousand, two hundred fifty-seven".