141681409 has 3 divisors (see below), whose sum is σ = 141693313.
Its totient is φ = 141669506.
The previous prime is 141681391. The next prime is 141681437. The reversal of 141681409 is 904186141.
The square root of 141681409 is 11903.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is not a de Polignac number, because 141681409 - 221 = 139584257 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (141681109) 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 2 ways as a sum of consecutive naturals, for example, 5952 + ... + 17854.
Almost surely, 2141681409 is an apocalyptic number.
141681409 is the 11903-rd square number.
141681409 is the 5952-nd centered octagonal number.
It is an amenable number.
141681409 is a deficient number, since it is larger than the sum of its proper divisors (11904).
141681409 is an frugal number, since it uses more digits than its factorization.
141681409 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 23806 (or 11903 counting only the distinct ones).
The product of its (nonzero) digits is 6912, while the sum is 34.
The cubic root of 141681409 is about 521.3198829373.
The spelling of 141681409 in words is "one hundred forty-one million, six hundred eighty-one thousand, four hundred nine".