12630981 has 16 divisors (see below), whose sum is σ = 18966528. Its totient is φ = 7407600.

The previous prime is 12630977. The next prime is 12630997. The reversal of 12630981 is 18903621.

12630981 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12630981 - 2² = 12630977 is a prime.

It is a super-2 number, since 2×12630981² = 319083362044722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12630941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5151 + ... + 7196.

It is an arithmetic number, because the mean of its divisors is an integer number (1185408).

Almost surely, 2^12630981 is an apocalyptic number.

12630981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12630981 is a deficient number, since it is larger than the sum of its proper divisors (6335547).

12630981 is a wasteful number, since it uses less digits than its factorization.

12630981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 12630981 is about 3554.0091446140. The cubic root of 12630981 is about 232.8872399797.

The spelling of 12630981 in words is "twelve million, six hundred thirty thousand, nine hundred eighty-one".