1345231212 has 72 divisors (see below), whose sum is σ = 3408894720. Its totient is φ = 412701120.

The previous prime is 1345231201. The next prime is 1345231229. The reversal of 1345231212 is 2121325431.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 889537 + ... + 891047.

It is an arithmetic number, because the mean of its divisors is an integer number (47345760).

Almost surely, 2^1345231212 is an apocalyptic number.

1345231212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1345231212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1704447360).

1345231212 is an abundant number, since it is smaller than the sum of its proper divisors (2063663508).

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

1345231212 is a wasteful number, since it uses less digits than its factorization.

1345231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983 (or 1968 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 1345231212 is about 36677.3937460120. The cubic root of 1345231212 is about 1103.9065538686.

Adding to 1345231212 its reverse (2121325431), we get a palindrome (3466556643).

The spelling of 1345231212 in words is "one billion, three hundred forty-five million, two hundred thirty-one thousand, two hundred twelve".