141718921 has 4 divisors (see below), whose sum is σ = 144042244. Its totient is φ = 139395600.

The previous prime is 141718903. The next prime is 141718933. The reversal of 141718921 is 129817141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129817141 = 73 ⋅1778317.

It can be written as a sum of positive squares in 2 ways, for example, as 61795321 + 79923600 = 7861^2 + 8940^2 .

It is a cyclic number.

It is not a de Polignac number, because 141718921 - 2⁷ = 141718793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141718961) 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 3 ways as a sum of consecutive naturals, for example, 1161570 + ... + 1161691.

It is an arithmetic number, because the mean of its divisors is an integer number (36010561).

Almost surely, 2^141718921 is an apocalyptic number.

It is an amenable number.

141718921 is a deficient number, since it is larger than the sum of its proper divisors (2323323).

141718921 is an equidigital number, since it uses as much as digits as its factorization.

141718921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323322.

The product of its digits is 4032, while the sum is 34.

The square root of 141718921 is about 11904.5756329237. The cubic root of 141718921 is about 521.3658876224.

The spelling of 141718921 in words is "one hundred forty-one million, seven hundred eighteen thousand, nine hundred twenty-one".