13212040 has 32 divisors (see below), whose sum is σ = 29830680. Its totient is φ = 5266432.

The previous prime is 13212013. The next prime is 13212053. The reversal of 13212040 is 4021231.

It can be written as a sum of positive squares in 4 ways, for example, as 8398404 + 4813636 = 2898^2 + 2194^2 .

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 13212040.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21984 + ... + 22576.

Almost surely, 2^13212040 is an apocalyptic number.

13212040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13212040 is an abundant number, since it is smaller than the sum of its proper divisors (16618640).

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

13212040 is a wasteful number, since it uses less digits than its factorization.

13212040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13212040 is about 3634.8369977208. The cubic root of 13212040 is about 236.4049830842.

Adding to 13212040 its reverse (4021231), we get a palindrome (17233271).

The spelling of 13212040 in words is "thirteen million, two hundred twelve thousand, forty".