29312421 has 16 divisors (see below), whose sum is σ = 41725440. Its totient is φ = 18249840.

The previous prime is 29312401. The next prime is 29312449. The reversal of 29312421 is 12421392.

It is not a de Polignac number, because 29312421 - 2⁶ = 29312357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29312391 and 29312400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29312401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426 + ... + 7668.

It is an arithmetic number, because the mean of its divisors is an integer number (2607840).

Almost surely, 2^29312421 is an apocalyptic number.

It is an amenable number.

29312421 is a deficient number, since it is larger than the sum of its proper divisors (12413019).

29312421 is a wasteful number, since it uses less digits than its factorization.

29312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7336.

The product of its digits is 864, while the sum is 24.

The square root of 29312421 is about 5414.0946611599. The cubic root of 29312421 is about 308.3310272695.

The spelling of 29312421 in words is "twenty-nine million, three hundred twelve thousand, four hundred twenty-one".