29256121 has 4 divisors (see below), whose sum is σ = 29330212. Its totient is φ = 29182032.

The previous prime is 29256119. The next prime is 29256191. The reversal of 29256121 is 12165292.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14899600 + 14356521 = 3860^2 + 3789^2 .

It is a cyclic number.

It is not a de Polignac number, because 29256121 - 2¹ = 29256119 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 29256121.

It is not an unprimeable number, because it can be changed into a prime (29256191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36450 + ... + 37243.

It is an arithmetic number, because the mean of its divisors is an integer number (7332553).

Almost surely, 2^29256121 is an apocalyptic number.

It is an amenable number.

29256121 is a deficient number, since it is larger than the sum of its proper divisors (74091).

29256121 is an equidigital number, since it uses as much as digits as its factorization.

29256121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74090.

The product of its digits is 2160, while the sum is 28.

The square root of 29256121 is about 5408.8927702442. The cubic root of 29256121 is about 308.1334982371.

The spelling of 29256121 in words is "twenty-nine million, two hundred fifty-six thousand, one hundred twenty-one".