29145521 has 2 divisors, whose sum is σ = 29145522. Its totient is φ = 29145520.

The previous prime is 29145511. The next prime is 29145569. The reversal of 29145521 is 12554192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15713296 + 13432225 = 3964^2 + 3665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29145521 is a prime.

It is a super-2 number, since 2×29145521² = 1698922788722882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29145511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14572760 + 14572761.

It is an arithmetic number, because the mean of its divisors is an integer number (14572761).

Almost surely, 2^29145521 is an apocalyptic number.

It is an amenable number.

29145521 is a deficient number, since it is larger than the sum of its proper divisors (1).

29145521 is an equidigital number, since it uses as much as digits as its factorization.

29145521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 29.

The square root of 29145521 is about 5398.6591853904. The cubic root of 29145521 is about 307.7447180546.

The spelling of 29145521 in words is "twenty-nine million, one hundred forty-five thousand, five hundred twenty-one".