1240234013 has 4 divisors (see below), whose sum is σ = 1243266780. Its totient is φ = 1237201248.

The previous prime is 1240234003. The next prime is 1240234027. The reversal of 1240234013 is 3104320421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 873970969 + 366263044 = 29563^2 + 19138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240234013 - 2¹⁶ = 1240168477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240234003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515770 + ... + 1516587.

It is an arithmetic number, because the mean of its divisors is an integer number (310816695).

Almost surely, 2^1240234013 is an apocalyptic number.

It is an amenable number.

1240234013 is a deficient number, since it is larger than the sum of its proper divisors (3032767).

1240234013 is an equidigital number, since it uses as much as digits as its factorization.

1240234013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032766.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1240234013 is about 35216.9563278827. The cubic root of 1240234013 is about 1074.4046497598.

Adding to 1240234013 its reverse (3104320421), we get a palindrome (4344554434).

The spelling of 1240234013 in words is "one billion, two hundred forty million, two hundred thirty-four thousand, thirteen".