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126631 is a prime number
BaseRepresentation
bin11110111010100111
320102201001
4132322213
513023011
62414131
71035121
oct367247
9212631
10126631
118715a
1261347
134583b
1434211
15277c1
hex1eea7

126631 has 2 divisors, whose sum is σ = 126632. Its totient is φ = 126630.

The previous prime is 126613. The next prime is 126641. The reversal of 126631 is 136621.

Together with previous prime (126613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (136621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-126631 is a prime.

It is a super-2 number, since 2×1266312 = 32070820322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126599 and 126608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63315 + 63316.

It is an arithmetic number, because the mean of its divisors is an integer number (63316).

2126631 is an apocalyptic number.

126631 is a deficient number, since it is larger than the sum of its proper divisors (1).

126631 is an equidigital number, since it uses as much as digits as its factorization.

126631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 126631 is about 355.8524975323. The cubic root of 126631 is about 50.2165276288.

It can be divided in two parts, 126 and 631, that added together give a palindrome (757).

The spelling of 126631 in words is "one hundred twenty-six thousand, six hundred thirty-one".