1243132013 has 16 divisors (see below), whose sum is σ = 1302884352. Its totient is φ = 1184976000.

The previous prime is 1243132001. The next prime is 1243132061. The reversal of 1243132013 is 3102313421.

It is a cyclic number.

It is not a de Polignac number, because 1243132013 - 2¹² = 1243127917 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 (1243132613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 587828 + ... + 589938.

It is an arithmetic number, because the mean of its divisors is an integer number (81430272).

Almost surely, 2^1243132013 is an apocalyptic number.

It is an amenable number.

1243132013 is a deficient number, since it is larger than the sum of its proper divisors (59752339).

1243132013 is a wasteful number, since it uses less digits than its factorization.

1243132013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1243132013 is about 35258.0772731583. The cubic root of 1243132013 is about 1075.2408367560.

Adding to 1243132013 its reverse (3102313421), we get a palindrome (4345445434).

It can be divided in two parts, 12431 and 32013, that added together give a palindrome (44444).

The spelling of 1243132013 in words is "one billion, two hundred forty-three million, one hundred thirty-two thousand, thirteen".