1315124243 has 4 divisors (see below), whose sum is σ = 1325479680. Its totient is φ = 1304768808.

The previous prime is 1315124231. The next prime is 1315124281. The reversal of 1315124243 is 3424215131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3424215131 = 19 ⋅180221849.

It is a cyclic number.

It is not a de Polignac number, because 1315124243 - 2⁶ = 1315124179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315126243) 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, 5177528 + ... + 5177781.

It is an arithmetic number, because the mean of its divisors is an integer number (331369920).

Almost surely, 2^1315124243 is an apocalyptic number.

1315124243 is a deficient number, since it is larger than the sum of its proper divisors (10355437).

1315124243 is a wasteful number, since it uses less digits than its factorization.

1315124243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10355436.

The product of its digits is 2880, while the sum is 26.

The square root of 1315124243 is about 36264.6417740476. The cubic root of 1315124243 is about 1095.6090085405.

Adding to 1315124243 its reverse (3424215131), we get a palindrome (4739339374).

The spelling of 1315124243 in words is "one billion, three hundred fifteen million, one hundred twenty-four thousand, two hundred forty-three".