1240303013 has 8 divisors (see below), whose sum is σ = 1283656920. Its totient is φ = 1197573120.

The previous prime is 1240302989. The next prime is 1240303039. The reversal of 1240303013 is 3103030421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 159340129 + 1080962884 = 12623^2 + 32878^2 .

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 1240303013 - 2⁸ = 1240302757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240302982 and 1240303000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240303093) 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, 151958 + ... + 159911.

It is an arithmetic number, because the mean of its divisors is an integer number (160457115).

Almost surely, 2^1240303013 is an apocalyptic number.

It is an amenable number.

1240303013 is a deficient number, since it is larger than the sum of its proper divisors (43353907).

1240303013 is an equidigital number, since it uses as much as digits as its factorization.

1240303013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312007.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1240303013 is about 35217.9359559870. The cubic root of 1240303013 is about 1074.4245741034.

Adding to 1240303013 its reverse (3103030421), we get a palindrome (4343333434).

The spelling of 1240303013 in words is "one billion, two hundred forty million, three hundred three thousand, thirteen".