141921681 has 8 divisors (see below), whose sum is σ = 206431584. Its totient is φ = 86013120.

The previous prime is 141921673. The next prime is 141921691. The reversal of 141921681 is 186129141.

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

It is not a de Polignac number, because 141921681 - 2³ = 141921673 is a prime.

It is a super-2 number, since 2×141921681² = 40283527075731522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 4300657 = 141921681 / (1 + 4 + 1 + 9 + 2 + 1 + 6 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (141921671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2150296 + ... + 2150361.

It is an arithmetic number, because the mean of its divisors is an integer number (25803948).

Almost surely, 2^141921681 is an apocalyptic number.

141921681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

141921681 is a deficient number, since it is larger than the sum of its proper divisors (64509903).

141921681 is a wasteful number, since it uses less digits than its factorization.

141921681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300671.

The product of its digits is 3456, while the sum is 33.

The square root of 141921681 is about 11913.0886423295. The cubic root of 141921681 is about 521.6144118887.

The spelling of 141921681 in words is "one hundred forty-one million, nine hundred twenty-one thousand, six hundred eighty-one".