12731020 has 24 divisors (see below), whose sum is σ = 27190800. Its totient is φ = 5005632.

The previous prime is 12731003. The next prime is 12731023. The reversal of 12731020 is 2013721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12730985 and 12731003.

It is not an unprimeable number, because it can be changed into a prime (12731023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4215 + ... + 6574.

It is an arithmetic number, because the mean of its divisors is an integer number (1132950).

Almost surely, 2^12731020 is an apocalyptic number.

12731020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12731020 is an abundant number, since it is smaller than the sum of its proper divisors (14459780).

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

12731020 is a wasteful number, since it uses less digits than its factorization.

12731020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10857 (or 10855 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 12731020 is about 3568.0554928420. The cubic root of 12731020 is about 233.5004562349.

Adding to 12731020 its reverse (2013721), we get a palindrome (14744741).

The spelling of 12731020 in words is "twelve million, seven hundred thirty-one thousand, twenty".