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12140857 = 24150377
BaseRepresentation
bin101110010100…
…000100111001
3211211211010101
4232110010321
511102001412
61112115401
7205124041
oct56240471
924754111
1012140857
116942673
124095b61
132691151
141880721
1510ec457
hexb94139

12140857 has 4 divisors (see below), whose sum is σ = 12191476. Its totient is φ = 12090240.

The previous prime is 12140851. The next prime is 12140861. The reversal of 12140857 is 75804121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8976016 + 3164841 = 2996^2 + 1779^2 .

It is a cyclic number.

It is not a de Polignac number, because 12140857 - 211 = 12138809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12140851) 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, 24948 + ... + 25429.

It is an arithmetic number, because the mean of its divisors is an integer number (3047869).

Almost surely, 212140857 is an apocalyptic number.

It is an amenable number.

12140857 is a deficient number, since it is larger than the sum of its proper divisors (50619).

12140857 is an equidigital number, since it uses as much as digits as its factorization.

12140857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50618.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 12140857 is about 3484.3732578471. The cubic root of 12140857 is about 229.8351496742.

Adding to 12140857 its reverse (75804121), we get a palindrome (87944978).

The spelling of 12140857 in words is "twelve million, one hundred forty thousand, eight hundred fifty-seven".

Divisors: 1 241 50377 12140857