1243040513 has 8 divisors (see below), whose sum is σ = 1460355456. Its totient is φ = 1043110800.

The previous prime is 1243040503. The next prime is 1243040531. The reversal of 1243040513 is 3150403421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243040513 - 2⁸ = 1243040257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243040503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4346153 + ... + 4346438.

It is an arithmetic number, because the mean of its divisors is an integer number (182544432).

Almost surely, 2^1243040513 is an apocalyptic number.

1243040513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1243040513 is a deficient number, since it is larger than the sum of its proper divisors (217314943).

1243040513 is a wasteful number, since it uses less digits than its factorization.

1243040513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8692615.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1243040513 is about 35256.7796742697. The cubic root of 1243040513 is about 1075.2144552858.

Adding to 1243040513 its reverse (3150403421), we get a palindrome (4393443934).

The spelling of 1243040513 in words is "one billion, two hundred forty-three million, forty thousand, five hundred thirteen".