29280421 has 2 divisors, whose sum is σ = 29280422. Its totient is φ = 29280420.

The previous prime is 29280397. The next prime is 29280439. The reversal of 29280421 is 12408292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29268100 + 12321 = 5410^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 29280421 - 2⁹ = 29279909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29280421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29283421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14640210 + 14640211.

It is an arithmetic number, because the mean of its divisors is an integer number (14640211).

Almost surely, 2^29280421 is an apocalyptic number.

It is an amenable number.

29280421 is a deficient number, since it is larger than the sum of its proper divisors (1).

29280421 is an equidigital number, since it uses as much as digits as its factorization.

29280421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 29280421 is about 5411.1386047670. The cubic root of 29280421 is about 308.2187860520.

The spelling of 29280421 in words is "twenty-nine million, two hundred eighty thousand, four hundred twenty-one".