29161281 has 16 divisors (see below), whose sum is σ = 40147200. Its totient is φ = 18818448.

The previous prime is 29161259. The next prime is 29161283. The reversal of 29161281 is 18216192.

It is a happy number.

It is not a de Polignac number, because 29161281 - 2¹⁴ = 29144897 is a prime.

It is a super-2 number, since 2×29161281² = 1700760619121922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29161283) 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, 10630 + ... + 13088.

It is an arithmetic number, because the mean of its divisors is an integer number (2509200).

Almost surely, 2^29161281 is an apocalyptic number.

It is an amenable number.

29161281 is a deficient number, since it is larger than the sum of its proper divisors (10985919).

29161281 is a wasteful number, since it uses less digits than its factorization.

29161281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588.

The product of its digits is 1728, while the sum is 30.

The square root of 29161281 is about 5400.1186098085. The cubic root of 29161281 is about 307.8001774946.

The spelling of 29161281 in words is "twenty-nine million, one hundred sixty-one thousand, two hundred eighty-one".