1240404513 has 16 divisors (see below), whose sum is σ = 1727308800. Its totient is φ = 790282064.

The previous prime is 1240404511. The next prime is 1240404523. The reversal of 1240404513 is 3154040421.

It is a cyclic number.

It is not a de Polignac number, because 1240404513 - 2¹ = 1240404511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240404511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77038 + ... + 91736.

It is an arithmetic number, because the mean of its divisors is an integer number (107956800).

Almost surely, 2^1240404513 is an apocalyptic number.

It is an amenable number.

1240404513 is a deficient number, since it is larger than the sum of its proper divisors (486904287).

1240404513 is a wasteful number, since it uses less digits than its factorization.

1240404513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15948.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1240404513 is about 35219.3769536033. The cubic root of 1240404513 is about 1074.4538817587.

Adding to 1240404513 its reverse (3154040421), we get a palindrome (4394444934).

The spelling of 1240404513 in words is "one billion, two hundred forty million, four hundred four thousand, five hundred thirteen".