1240423229 has 2 divisors, whose sum is σ = 1240423230. Its totient is φ = 1240423228.

The previous prime is 1240423199. The next prime is 1240423253. The reversal of 1240423229 is 9223240421.

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., 1185218329 + 55204900 = 34427^2 + 7430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240423229 - 2⁸ = 1240422973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240423259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620211614 + 620211615.

It is an arithmetic number, because the mean of its divisors is an integer number (620211615).

Almost surely, 2^1240423229 is an apocalyptic number.

It is an amenable number.

1240423229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240423229 is an equidigital number, since it uses as much as digits as its factorization.

1240423229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1240423229 is about 35219.6426586074. The cubic root of 1240423229 is about 1074.4592857425.

The spelling of 1240423229 in words is "one billion, two hundred forty million, four hundred twenty-three thousand, two hundred twenty-nine".