1243355012 has 18 divisors (see below), whose sum is σ = 2230247754. Its totient is φ = 606511360.

The previous prime is 1243354951. The next prime is 1243355017. The reversal of 1243355012 is 2105533421.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 180203776 + 1063151236 = 13424^2 + 32606^2 .

It is not an unprimeable number, because it can be changed into a prime (1243355017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85733 + ... + 99180.

It is an arithmetic number, because the mean of its divisors is an integer number (123902653).

Almost surely, 2^1243355012 is an apocalyptic number.

It is an amenable number.

1243355012 is a deficient number, since it is larger than the sum of its proper divisors (986892742).

1243355012 is a wasteful number, since it uses less digits than its factorization.

1243355012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184999 (or 184956 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1243355012 is about 35261.2395130971. The cubic root of 1243355012 is about 1075.3051268697.

Adding to 1243355012 its reverse (2105533421), we get a palindrome (3348888433).

The spelling of 1243355012 in words is "one billion, two hundred forty-three million, three hundred fifty-five thousand, twelve".