1231517260 has 12 divisors (see below), whose sum is σ = 2586186288. Its totient is φ = 492606896.

The previous prime is 1231517251. The next prime is 1231517327. The reversal of 1231517260 is 627151321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30787912 + ... + 30787951.

It is an arithmetic number, because the mean of its divisors is an integer number (215515524).

Almost surely, 2^1231517260 is an apocalyptic number.

1231517260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231517260 is an abundant number, since it is smaller than the sum of its proper divisors (1354669028).

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

1231517260 is a wasteful number, since it uses less digits than its factorization.

1231517260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61575872 (or 61575870 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1231517260 is about 35092.9802097229. The cubic root of 1231517260 is about 1071.8816455713.

Adding to 1231517260 its reverse (627151321), we get a palindrome (1858668581).

The spelling of 1231517260 in words is "one billion, two hundred thirty-one million, five hundred seventeen thousand, two hundred sixty".