29125881 has 12 divisors (see below), whose sum is σ = 42784560. Its totient is φ = 19087800.

The previous prime is 29125871. The next prime is 29125883. The reversal of 29125881 is 18852192.

It is not a de Polignac number, because 29125881 - 2¹¹ = 29123833 is a prime.

It is a super-2 number, since 2×29125881² = 1696633888052322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29125883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26895 + ... + 27956.

It is an arithmetic number, because the mean of its divisors is an integer number (3565380).

Almost surely, 2^29125881 is an apocalyptic number.

It is an amenable number.

29125881 is a deficient number, since it is larger than the sum of its proper divisors (13658679).

29125881 is a wasteful number, since it uses less digits than its factorization.

29125881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54916 (or 54913 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 29125881 is about 5396.8399086873. The cubic root of 29125881 is about 307.6755769060.

The spelling of 29125881 in words is "twenty-nine million, one hundred twenty-five thousand, eight hundred eighty-one".