1229040361 has 4 divisors (see below), whose sum is σ = 1233235332. Its totient is φ = 1224845392.

The previous prime is 1229040331. The next prime is 1229040377. The reversal of 1229040361 is 1630409221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 613057600 + 615982761 = 24760^2 + 24819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229040361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229040301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2097046 + ... + 2097631.

It is an arithmetic number, because the mean of its divisors is an integer number (308308833).

Almost surely, 2^1229040361 is an apocalyptic number.

It is an amenable number.

1229040361 is a deficient number, since it is larger than the sum of its proper divisors (4194971).

1229040361 is an equidigital number, since it uses as much as digits as its factorization.

1229040361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194970.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1229040361 is about 35057.6719278391. The cubic root of 1229040361 is about 1071.1625530668.

Adding to 1229040361 its reverse (1630409221), we get a palindrome (2859449582).

The spelling of 1229040361 in words is "one billion, two hundred twenty-nine million, forty thousand, three hundred sixty-one".