29161321 has 6 divisors (see below), whose sum is σ = 33922410. Its totient is φ = 24995376.

The previous prime is 29161313. The next prime is 29161331. The reversal of 29161321 is 12316192.

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 3759721 = 5040^2 + 1939^2 .

It is not a de Polignac number, because 29161321 - 2³ = 29161313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29161331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 297516 + ... + 297613.

It is an arithmetic number, because the mean of its divisors is an integer number (5653735).

Almost surely, 2^29161321 is an apocalyptic number.

It is an amenable number.

29161321 is a deficient number, since it is larger than the sum of its proper divisors (4761089).

29161321 is an equidigital number, since it uses as much as digits as its factorization.

29161321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595143 (or 595136 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

The square root of 29161321 is about 5400.1223134296. The cubic root of 29161321 is about 307.8003182292.

The spelling of 29161321 in words is "twenty-nine million, one hundred sixty-one thousand, three hundred twenty-one".