1243304141 has 4 divisors (see below), whose sum is σ = 1243996284. Its totient is φ = 1242612000.

The previous prime is 1243304137. The next prime is 1243304149. The reversal of 1243304141 is 1414033421.

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 137475625 + 1105828516 = 11725^2 + 33254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243304141 - 2² = 1243304137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243304149) 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, 343370 + ... + 346971.

It is an arithmetic number, because the mean of its divisors is an integer number (310999071).

Almost surely, 2^1243304141 is an apocalyptic number.

It is an amenable number.

1243304141 is a deficient number, since it is larger than the sum of its proper divisors (692143).

1243304141 is an equidigital number, since it uses as much as digits as its factorization.

1243304141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692142.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1243304141 is about 35260.5181612523. The cubic root of 1243304141 is about 1075.2904615508.

Adding to 1243304141 its reverse (1414033421), we get a palindrome (2657337562).

The spelling of 1243304141 in words is "one billion, two hundred forty-three million, three hundred four thousand, one hundred forty-one".