141781685 has 4 divisors (see below), whose sum is σ = 170138028. Its totient is φ = 113425344.

The previous prime is 141781681. The next prime is 141781687. The reversal of 141781685 is 586187141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586187141 = 131 ⋅4474711.

It can be written as a sum of positive squares in 2 ways, for example, as 69989956 + 71791729 = 8366^2 + 8473^2 .

It is a cyclic number.

It is not a de Polignac number, because 141781685 - 2² = 141781681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141781681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14178164 + ... + 14178173.

It is an arithmetic number, because the mean of its divisors is an integer number (42534507).

Almost surely, 2^141781685 is an apocalyptic number.

It is an amenable number.

141781685 is a deficient number, since it is larger than the sum of its proper divisors (28356343).

141781685 is an equidigital number, since it uses as much as digits as its factorization.

141781685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28356342.

The product of its digits is 53760, while the sum is 41.

The square root of 141781685 is about 11907.2114703653. The cubic root of 141781685 is about 521.4428431876.

The spelling of 141781685 in words is "one hundred forty-one million, seven hundred eighty-one thousand, six hundred eighty-five".