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BaseRepresentation
bin11110100001100100111
31212211001121
43310030213
5224001411
633234411
711334061
oct3641447
91784047
101000231
11623541
12402a07
1329036b
141c0731
1514b571
hexf4327

1000231 has 2 divisors, whose sum is σ = 1000232. Its totient is φ = 1000230.

The previous prime is 1000213. The next prime is 1000249. The reversal of 1000231 is 1320001.

Together with previous prime (1000213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1000213) and next prime (1000249).

It is a cyclic number.

It is not a de Polignac number, because 1000231 - 25 = 1000199 is a prime.

It is a super-2 number, since 2×10002312 = 2000924106722, which contains 22 as substring.

1000231 is a modest number, since divided by 231 gives 1 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000211) 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 as a sum of consecutive naturals, namely, 500115 + 500116.

It is an arithmetic number, because the mean of its divisors is an integer number (500116).

21000231 is an apocalyptic number.

1000231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000231 is an equidigital number, since it uses as much as digits as its factorization.

1000231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1000231 is about 1000.1154933306. The cubic root of 1000231 is about 100.0076994072.

Adding to 1000231 its reverse (1320001), we get a palindrome (2320232).

The spelling of 1000231 in words is "one million, two hundred thirty-one", and thus it is an aban number.