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1268831 = 3074133
BaseRepresentation
bin100110101110001011111
32101110111202
410311301133
5311100311
643110115
713533134
oct4656137
92343452
101268831
11797323
1251233b
133556b5
1425058b
151a0e3b
hex135c5f

1268831 has 4 divisors (see below), whose sum is σ = 1273272. Its totient is φ = 1264392.

The previous prime is 1268807. The next prime is 1268843. The reversal of 1268831 is 1388621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1268831 is a prime.

It is a super-2 number, since 2×12688312 = 3219864213122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1268794 and 1268803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268881) 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, 1760 + ... + 2373.

It is an arithmetic number, because the mean of its divisors is an integer number (318318).

21268831 is an apocalyptic number.

1268831 is a deficient number, since it is larger than the sum of its proper divisors (4441).

1268831 is an equidigital number, since it uses as much as digits as its factorization.

1268831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440.

The product of its digits is 2304, while the sum is 29.

The square root of 1268831 is about 1126.4239876707. The cubic root of 1268831 is about 108.2599761104.

The spelling of 1268831 in words is "one million, two hundred sixty-eight thousand, eight hundred thirty-one".

Divisors: 1 307 4133 1268831