12651919 has 8 divisors (see below), whose sum is σ = 14564480. Its totient is φ = 10765656.

The previous prime is 12651907. The next prime is 12651923. The reversal of 12651919 is 91915621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12651919 - 2⁵ = 12651887 is a prime.

It is a super-2 number, since 2×12651919² = 320142108765122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5529 + ... + 7474.

It is an arithmetic number, because the mean of its divisors is an integer number (1820560).

Almost surely, 2^12651919 is an apocalyptic number.

12651919 is a deficient number, since it is larger than the sum of its proper divisors (1912561).

12651919 is a wasteful number, since it uses less digits than its factorization.

12651919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13149.

The product of its digits is 4860, while the sum is 34.

The square root of 12651919 is about 3556.9536122924. The cubic root of 12651919 is about 233.0158523479.

The spelling of 12651919 in words is "twelve million, six hundred fifty-one thousand, nine hundred nineteen".