29721141 has 8 divisors (see below), whose sum is σ = 44031360. Its totient is φ = 19814076.

The previous prime is 29721137. The next prime is 29721163. The reversal of 29721141 is 14112792.

It is not a de Polignac number, because 29721141 - 2² = 29721137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1100783 = 29721141 / (2 + 9 + 7 + 2 + 1 + 1 + 4 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29726141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550365 + ... + 550418.

It is an arithmetic number, because the mean of its divisors is an integer number (5503920).

Almost surely, 2^29721141 is an apocalyptic number.

It is an amenable number.

29721141 is a deficient number, since it is larger than the sum of its proper divisors (14310219).

29721141 is a wasteful number, since it uses less digits than its factorization.

29721141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100792 (or 1100786 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 29721141 is about 5451.7099152468. The cubic root of 29721141 is about 309.7574967846.

The spelling of 29721141 in words is "twenty-nine million, seven hundred twenty-one thousand, one hundred forty-one".