29121955 has 16 divisors (see below), whose sum is σ = 35554464. Its totient is φ = 22896640.

The previous prime is 29121947. The next prime is 29121959. The reversal of 29121955 is 55912192.

It is not a de Polignac number, because 29121955 - 2³ = 29121947 is a prime.

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 29121955.

It is not an unprimeable number, because it can be changed into a prime (29121959) 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, 113187 + ... + 113443.

It is an arithmetic number, because the mean of its divisors is an integer number (2222154).

Almost surely, 2^29121955 is an apocalyptic number.

29121955 is a deficient number, since it is larger than the sum of its proper divisors (6432509).

29121955 is a wasteful number, since it uses less digits than its factorization.

29121955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its digits is 8100, while the sum is 34.

The square root of 29121955 is about 5396.4761650544. The cubic root of 29121955 is about 307.6617519898.

The spelling of 29121955 in words is "twenty-nine million, one hundred twenty-one thousand, nine hundred fifty-five".