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BaseRepresentation
bin100000000100111001
320200020010
4200010321
513201020
62452133
71055022
oct400471
9220203
10131385
118a791
1264049
1347a57
1435c49
1528de0
hex20139

131385 has 16 divisors (see below), whose sum is σ = 221760. Its totient is φ = 66240.

The previous prime is 131381. The next prime is 131413. The reversal of 131385 is 583131.

It is a happy number.

It is not a de Polignac number, because 131385 - 22 = 131381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55 + ... + 515.

It is an arithmetic number, because the mean of its divisors is an integer number (13860).

2131385 is an apocalyptic number.

131385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131385 is a deficient number, since it is larger than the sum of its proper divisors (90375).

131385 is a wasteful number, since it uses less digits than its factorization.

131385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

The product of its digits is 360, while the sum is 21.

The square root of 131385 is about 362.4706884701. The cubic root of 131385 is about 50.8372358078.

The spelling of 131385 in words is "one hundred thirty-one thousand, three hundred eighty-five".