141929721 has 12 divisors (see below), whose sum is σ = 207124372. Its totient is φ = 93643776.

The previous prime is 141929717. The next prime is 141929759. The reversal of 141929721 is 127929141.

It can be written as a sum of positive squares in 2 ways, for example, as 32936121 + 108993600 = 5739^2 + 10440^2 .

It is not a de Polignac number, because 141929721 - 2² = 141929717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141929701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80416 + ... + 82161.

Almost surely, 2^141929721 is an apocalyptic number.

It is an amenable number.

141929721 is a deficient number, since it is larger than the sum of its proper divisors (65194651).

141929721 is a wasteful number, since it uses less digits than its factorization.

141929721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162680 (or 162677 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 141929721 is about 11913.4260815267. The cubic root of 141929721 is about 521.6242616891.

The spelling of 141929721 in words is "one hundred forty-one million, nine hundred twenty-nine thousand, seven hundred twenty-one".