141805121 has 2 divisors, whose sum is σ = 141805122. Its totient is φ = 141805120.

The previous prime is 141805117. The next prime is 141805141. The reversal of 141805121 is 121508141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140754496 + 1050625 = 11864^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 141805121 - 2² = 141805117 is a prime.

It is a super-3 number, since 3×141805121³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (141805141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70902560 + 70902561.

It is an arithmetic number, because the mean of its divisors is an integer number (70902561).

Almost surely, 2^141805121 is an apocalyptic number.

It is an amenable number.

141805121 is a deficient number, since it is larger than the sum of its proper divisors (1).

141805121 is an equidigital number, since it uses as much as digits as its factorization.

141805121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 141805121 is about 11908.1955392074. The cubic root of 141805121 is about 521.4715724771.

The spelling of 141805121 in words is "one hundred forty-one million, eight hundred five thousand, one hundred twenty-one".