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BaseRepresentation
bin11110000010010111
320020202201
4132002113
512414111
62345331
71021456
oct360227
9206681
10123031
1184487
125b247
1343ccc
1432b9d
15266c1
hex1e097

123031 has 2 divisors, whose sum is σ = 123032. Its totient is φ = 123030.

The previous prime is 123017. The next prime is 123049. The reversal of 123031 is 130321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123031 - 215 = 90263 is a prime.

It is a super-2 number, since 2×1230312 = 30273253922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 122999 and 123017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515 + 61516.

It is an arithmetic number, because the mean of its divisors is an integer number (61516).

2123031 is an apocalyptic number.

123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031 is an equidigital number, since it uses as much as digits as its factorization.

123031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 123031 is about 350.7577511617. The cubic root of 123031 is about 49.7360760003.

Adding to 123031 its reverse (130321), we get a palindrome (253352).

It can be divided in two parts, 1 and 23031, that added together give a palindrome (23032).

The spelling of 123031 in words is "one hundred twenty-three thousand, thirty-one".