1315240638 has 16 divisors (see below), whose sum is σ = 2631795840. Its totient is φ = 438194456.

The previous prime is 1315240637. The next prime is 1315240639. The reversal of 1315240638 is 8360425131.

It is an interprime number because it is at equal distance from previous prime (1315240637) and next prime (1315240639).

It is a junction number, because it is equal to n+sod(n) for n = 1315240599 and 1315240608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315240637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41520 + ... + 65987.

It is an arithmetic number, because the mean of its divisors is an integer number (164487240).

Almost surely, 2^1315240638 is an apocalyptic number.

1315240638 is an abundant number, since it is smaller than the sum of its proper divisors (1316555202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1315240638 is a wasteful number, since it uses less digits than its factorization.

1315240638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109551.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1315240638 is about 36266.2465386205. The cubic root of 1315240638 is about 1095.6413298590.

Adding to 1315240638 its reverse (8360425131), we get a palindrome (9675665769).

The spelling of 1315240638 in words is "one billion, three hundred fifteen million, two hundred forty thousand, six hundred thirty-eight".