1236240013 has 8 divisors (see below), whose sum is σ = 1265892480. Its totient is φ = 1206727200.

The previous prime is 1236239989. The next prime is 1236240023. The reversal of 1236240013 is 3100426321.

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 1236240013 - 2²⁵ = 1202685581 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 (1236240023) 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, 16888 + ... + 52513.

It is an arithmetic number, because the mean of its divisors is an integer number (158236560).

Almost surely, 2^1236240013 is an apocalyptic number.

It is an amenable number.

1236240013 is a deficient number, since it is larger than the sum of its proper divisors (29652467).

1236240013 is an equidigital number, since it uses as much as digits as its factorization.

1236240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69827.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1236240013 is about 35160.2049624288. The cubic root of 1236240013 is about 1073.2500862505.

Adding to 1236240013 its reverse (3100426321), we get a palindrome (4336666334).

The spelling of 1236240013 in words is "one billion, two hundred thirty-six million, two hundred forty thousand, thirteen".