12820461 has 8 divisors (see below), whose sum is σ = 17160000. Its totient is φ = 8513952.

The previous prime is 12820427. The next prime is 12820481. The reversal of 12820461 is 16402821.

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

It is not a de Polignac number, because 12820461 - 2¹⁵ = 12787693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820481) 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, 7336 + ... + 8913.

It is an arithmetic number, because the mean of its divisors is an integer number (2145000).

Almost surely, 2^12820461 is an apocalyptic number.

It is an amenable number.

12820461 is a deficient number, since it is larger than the sum of its proper divisors (4339539).

12820461 is a wasteful number, since it uses less digits than its factorization.

12820461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16515.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12820461 is about 3580.5671338490. The cubic root of 12820461 is about 234.0459950495.

The spelling of 12820461 in words is "twelve million, eight hundred twenty thousand, four hundred sixty-one".