141905 has 8 divisors (see below), whose sum is σ = 172584. Its totient is φ = 112000.

The previous prime is 141871. The next prime is 141907. The reversal of 141905 is 509141.

It can be written as a sum of positive squares in 4 ways, for example, as 59536 + 82369 = 244^2 + 287^2 .

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

It is not a de Polignac number, because 141905 - 2⁸ = 141649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141907) 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 in 7 ways as a sum of consecutive naturals, for example, 365 + ... + 645.

It is an arithmetic number, because the mean of its divisors is an integer number (21573).

2¹⁴¹⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

141905 is a deficient number, since it is larger than the sum of its proper divisors (30679).

141905 is a wasteful number, since it uses less digits than its factorization.

141905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 141905 is about 376.7028006267. The cubic root of 141905 is about 52.1593974817.

Subtracting 141905 from its reverse (509141), we obtain a square (367236 = 606²).

The spelling of 141905 in words is "one hundred forty-one thousand, nine hundred five".