12651940 has 24 divisors (see below), whose sum is σ = 30364992. Its totient is φ = 4337760.

The previous prime is 12651923. The next prime is 12651941. The reversal of 12651940 is 4915621.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12651899 and 12651908.

It is not an unprimeable number, because it can be changed into a prime (12651941) 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, 45046 + ... + 45325.

It is an arithmetic number, because the mean of its divisors is an integer number (1265208).

Almost surely, 2^12651940 is an apocalyptic number.

12651940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12651940 is an abundant number, since it is smaller than the sum of its proper divisors (17713052).

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

12651940 is a wasteful number, since it uses less digits than its factorization.

12651940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90387 (or 90385 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 12651940 is about 3556.9565642555. The cubic root of 12651940 is about 233.0159812698.

The spelling of 12651940 in words is "twelve million, six hundred fifty-one thousand, nine hundred forty".