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120531 = 340177
BaseRepresentation
bin11101011011010011
320010100010
4131123103
512324111
62330003
71011255
oct353323
9203303
10120531
1182614
1259903
1342b28
1431cd5
1525aa6
hex1d6d3

120531 has 4 divisors (see below), whose sum is σ = 160712. Its totient is φ = 80352.

The previous prime is 120511. The next prime is 120539. The reversal of 120531 is 135021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135021 = 345007.

It is not a de Polignac number, because 120531 - 213 = 112339 is a prime.

It is a super-2 number, since 2×1205312 = 29055443922, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120539) 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 in 3 ways as a sum of consecutive naturals, for example, 20086 + ... + 20091.

It is an arithmetic number, because the mean of its divisors is an integer number (40178).

2120531 is an apocalyptic number.

120531 is a deficient number, since it is larger than the sum of its proper divisors (40181).

120531 is an equidigital number, since it uses as much as digits as its factorization.

120531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40180.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 120531 is about 347.1757480009. The cubic root of 120531 is about 49.3968876948.

Adding to 120531 its reverse (135021), we get a palindrome (255552).

The spelling of 120531 in words is "one hundred twenty thousand, five hundred thirty-one".

Divisors: 1 3 40177 120531