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42131 is a prime number
BaseRepresentation
bin1010010010010011
32010210102
422102103
52322011
6523015
7233555
oct122223
963712
1042131
1129721
122046b
131623b
14114d5
15c73b
hexa493

42131 has 2 divisors, whose sum is σ = 42132. Its totient is φ = 42130.

The previous prime is 42101. The next prime is 42139. The reversal of 42131 is 13124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42131 - 214 = 25747 is a prime.

It is a super-2 number, since 2×421312 = 3550042322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a plaindrome in base 7 and base 8.

It is not a weakly prime, because it can be changed into another prime (42139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065 + 21066.

It is an arithmetic number, because the mean of its divisors is an integer number (21066).

242131 is an apocalyptic number.

42131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42131 is an equidigital number, since it uses as much as digits as its factorization.

42131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24, while the sum is 11.

The square root of 42131 is about 205.2583737634. The cubic root of 42131 is about 34.7963685822.

Adding to 42131 its reverse (13124), we get a palindrome (55255).

The spelling of 42131 in words is "forty-two thousand, one hundred thirty-one".