29901421 has 16 divisors (see below), whose sum is σ = 34790400. Its totient is φ = 25412400.

The previous prime is 29901397. The next prime is 29901451. The reversal of 29901421 is 12410992.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 29901421 - 2¹⁵ = 29868653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29901421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29901451) 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 15 ways as a sum of consecutive naturals, for example, 15606 + ... + 17416.

It is an arithmetic number, because the mean of its divisors is an integer number (2174400).

Almost surely, 2^29901421 is an apocalyptic number.

It is an amenable number.

29901421 is a deficient number, since it is larger than the sum of its proper divisors (4888979).

29901421 is a wasteful number, since it uses less digits than its factorization.

29901421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 29901421 is about 5468.2191799525. The cubic root of 29901421 is about 310.3825350478.

The spelling of 29901421 in words is "twenty-nine million, nine hundred one thousand, four hundred twenty-one".