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131242 = 2211311
BaseRepresentation
bin100000000010101010
320200000211
4200002222
513144432
62451334
71054426
oct400252
9220024
10131242
118a671
1263b4a
1347977
1435b86
1528d47
hex200aa

131242 has 8 divisors (see below), whose sum is σ = 198432. Its totient is φ = 65100.

The previous prime is 131231. The next prime is 131249. The reversal of 131242 is 242131.

Adding to 131242 its reverse (242131), we get a palindrome (373373).

Subtracting 131242 from its reverse (242131), we obtain a square (110889 = 3332).

It can be divided in two parts, 131 and 242, that added together give a palindrome (373).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (131249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267 + ... + 577.

It is an arithmetic number, because the mean of its divisors is an integer number (24804).

131242 is a Friedman number, since it can be written as 422*311, using all its digits and the basic arithmetic operations.

It is a vampire number, since it can be written as 311422 (with its own digits).

2131242 is an apocalyptic number.

131242 is a deficient number, since it is larger than the sum of its proper divisors (67190).

131242 is a wasteful number, since it uses less digits than its factorization.

131242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524.

The product of its digits is 48, while the sum is 13.

The square root of 131242 is about 362.2733774375. The cubic root of 131242 is about 50.8187852901.

The spelling of 131242 in words is "one hundred thirty-one thousand, two hundred forty-two".

Divisors: 1 2 211 311 422 622 65621 131242