29272421 has 2 divisors, whose sum is σ = 29272422. Its totient is φ = 29272420.

The previous prime is 29272409. The next prime is 29272429. The reversal of 29272421 is 12427292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25391521 + 3880900 = 5039^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 29272421 - 2¹⁸ = 29010277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29272429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14636210 + 14636211.

It is an arithmetic number, because the mean of its divisors is an integer number (14636211).

Almost surely, 2^29272421 is an apocalyptic number.

It is an amenable number.

29272421 is a deficient number, since it is larger than the sum of its proper divisors (1).

29272421 is an equidigital number, since it uses as much as digits as its factorization.

29272421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 29272421 is about 5410.3993383114. The cubic root of 29272421 is about 308.1907129710.

The spelling of 29272421 in words is "twenty-nine million, two hundred seventy-two thousand, four hundred twenty-one".