1235131229 has 2 divisors, whose sum is σ = 1235131230. Its totient is φ = 1235131228.

The previous prime is 1235131181. The next prime is 1235131259. The reversal of 1235131229 is 9221315321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682411129 + 552720100 = 26123^2 + 23510^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235131229 - 2¹² = 1235127133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235131259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617565614 + 617565615.

It is an arithmetic number, because the mean of its divisors is an integer number (617565615).

Almost surely, 2^1235131229 is an apocalyptic number.

It is an amenable number.

1235131229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235131229 is an equidigital number, since it uses as much as digits as its factorization.

1235131229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 1235131229 is about 35144.4338267100. The cubic root of 1235131229 is about 1072.9291241774.

The spelling of 1235131229 in words is "one billion, two hundred thirty-five million, one hundred thirty-one thousand, two hundred twenty-nine".