29921001 has 24 divisors (see below), whose sum is σ = 44241120. Its totient is φ = 17973120.

The previous prime is 29920997. The next prime is 29921009. The reversal of 29921001 is 10012992.

It is not a de Polignac number, because 29921001 - 2² = 29920997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29921009) 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 23 ways as a sum of consecutive naturals, for example, 50161 + ... + 50753.

It is an arithmetic number, because the mean of its divisors is an integer number (1843380).

Almost surely, 2^29921001 is an apocalyptic number.

It is an amenable number.

29921001 is a deficient number, since it is larger than the sum of its proper divisors (14320119).

29921001 is a wasteful number, since it uses less digits than its factorization.

29921001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 29921001 is about 5470.0092321677. The cubic root of 29921001 is about 310.4502683283.

Adding to 29921001 its reverse (10012992), we get a palindrome (39933993).

It can be divided in two parts, 2992 and 1001, that multiplied together give a palindrome (2994992).

The spelling of 29921001 in words is "twenty-nine million, nine hundred twenty-one thousand, one".