1235131307 has 2 divisors, whose sum is σ = 1235131308. Its totient is φ = 1235131306.

The previous prime is 1235131279. The next prime is 1235131321. The reversal of 1235131307 is 7031315321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1235131307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1235131367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617565653 + 617565654.

It is an arithmetic number, because the mean of its divisors is an integer number (617565654).

Almost surely, 2^1235131307 is an apocalyptic number.

1235131307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235131307 is an equidigital number, since it uses as much as digits as its factorization.

1235131307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 1235131307 is about 35144.4349364163. The cubic root of 1235131307 is about 1072.9291467630.

Adding to 1235131307 its reverse (7031315321), we get a palindrome (8266446628).

The spelling of 1235131307 in words is "one billion, two hundred thirty-five million, one hundred thirty-one thousand, three hundred seven".