141871921 has 9 divisors (see below), whose sum is σ = 145774251. Its totient is φ = 138072312.

The previous prime is 141871907. The next prime is 141871927. The reversal of 141871921 is 129178141.

The square root of 141871921 is 11911.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 24453025 + 117418896 = 4945^2 + 10836^2 .

It is not a de Polignac number, because 141871921 - 2¹¹ = 141869873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141871927) 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 8 ways as a sum of consecutive naturals, for example, 512035 + ... + 512311.

It is an arithmetic number, because the mean of its divisors is an integer number (16197139).

Almost surely, 2^141871921 is an apocalyptic number.

141871921 is the 11911-st square number.

141871921 is the 5956-th centered octagonal number.

It is an amenable number.

141871921 is a deficient number, since it is larger than the sum of its proper divisors (3902330).

141871921 is an frugal number, since it uses more digits than its factorization.

141871921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 320 counting only the distinct ones).

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

The cubic root of 141871921 is about 521.5534426579.

The spelling of 141871921 in words is "one hundred forty-one million, eight hundred seventy-one thousand, nine hundred twenty-one".