141397921 has 4 divisors (see below), whose sum is σ = 161597632. Its totient is φ = 121198212.

The previous prime is 141397909. The next prime is 141397931. The reversal of 141397921 is 129793141.

141397921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129793141 = 1871 ⋅69371.

It is a cyclic number.

It is not a de Polignac number, because 141397921 - 2²¹ = 139300769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (141397931) 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, 10099845 + ... + 10099858.

It is an arithmetic number, because the mean of its divisors is an integer number (40399408).

Almost surely, 2^141397921 is an apocalyptic number.

It is an amenable number.

141397921 is a deficient number, since it is larger than the sum of its proper divisors (20199711).

141397921 is an equidigital number, since it uses as much as digits as its factorization.

141397921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20199710.

The product of its digits is 13608, while the sum is 37.

The square root of 141397921 is about 11891.0857788513. The cubic root of 141397921 is about 520.9719506514.

The spelling of 141397921 in words is "one hundred forty-one million, three hundred ninety-seven thousand, nine hundred twenty-one".