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12148889 = 47258487
BaseRepresentation
bin101110010110…
…000010011001
3211212020010212
4232112002121
511102231024
61112220505
7205156334
oct56260231
924766125
1012148889
116948705
12409a735
1326949bc
14188361b
1510eea0e
hexb96099

12148889 has 4 divisors (see below), whose sum is σ = 12407424. Its totient is φ = 11890356.

The previous prime is 12148861. The next prime is 12148891. The reversal of 12148889 is 98884121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12148889 - 212 = 12144793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12148849) 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 3 ways as a sum of consecutive naturals, for example, 129197 + ... + 129290.

It is an arithmetic number, because the mean of its divisors is an integer number (3101856).

Almost surely, 212148889 is an apocalyptic number.

It is an amenable number.

12148889 is a deficient number, since it is larger than the sum of its proper divisors (258535).

12148889 is an equidigital number, since it uses as much as digits as its factorization.

12148889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258534.

The product of its digits is 36864, while the sum is 41.

The square root of 12148889 is about 3485.5256418509. The cubic root of 12148889 is about 229.8858223458.

The spelling of 12148889 in words is "twelve million, one hundred forty-eight thousand, eight hundred eighty-nine".

Divisors: 1 47 258487 12148889