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12272807 = 31395897
BaseRepresentation
bin101110110100…
…010010100111
3212002112010102
4232310102213
511120212212
61115014315
7206213531
oct56642247
925075112
1012272807
116a22818
12413a39b
132709221
1418b6851
1511265c2
hexbb44a7

12272807 has 4 divisors (see below), whose sum is σ = 12668736. Its totient is φ = 11876880.

The previous prime is 12272801. The next prime is 12272831. The reversal of 12272807 is 70827221.

12272807 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70827221 = 413317137.

It is a cyclic number.

It is not a de Polignac number, because 12272807 - 28 = 12272551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12272807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12272801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197918 + ... + 197979.

It is an arithmetic number, because the mean of its divisors is an integer number (3167184).

Almost surely, 212272807 is an apocalyptic number.

12272807 is a deficient number, since it is larger than the sum of its proper divisors (395929).

12272807 is an equidigital number, since it uses as much as digits as its factorization.

12272807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395928.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12272807 is about 3503.2566277679. The cubic root of 12272807 is about 230.6647874354.

The spelling of 12272807 in words is "twelve million, two hundred seventy-two thousand, eight hundred seven".

Divisors: 1 31 395897 12272807