12969940 has 24 divisors (see below), whose sum is σ = 27902952. Its totient is φ = 5061120.

The previous prime is 12969937. The next prime is 12969941. The reversal of 12969940 is 4996921.

It can be written as a sum of positive squares in 4 ways, for example, as 887364 + 12082576 = 942^2 + 3476^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12969893 and 12969902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12969941) 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, 7089 + ... + 8728.

It is an arithmetic number, because the mean of its divisors is an integer number (1162623).

Almost surely, 2^12969940 is an apocalyptic number.

12969940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12969940 is an abundant number, since it is smaller than the sum of its proper divisors (14933012).

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

12969940 is a wasteful number, since it uses less digits than its factorization.

12969940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15867 (or 15865 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 12969940 is about 3601.3802909440. The cubic root of 12969940 is about 234.9520952602.

It can be divided in two parts, 1296 and 9940, that added together give a square (11236 = 106²).

The spelling of 12969940 in words is "twelve million, nine hundred sixty-nine thousand, nine hundred forty".