29125221 has 8 divisors (see below), whose sum is σ = 38861664. Its totient is φ = 19402800.

The previous prime is 29125219. The next prime is 29125223. The reversal of 29125221 is 12252192.

It is an interprime number because it is at equal distance from previous prime (29125219) and next prime (29125223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29125221 - 2¹ = 29125219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29125191 and 29125200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29125223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3150 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (4857708).

Almost surely, 2^29125221 is an apocalyptic number.

It is an amenable number.

29125221 is a deficient number, since it is larger than the sum of its proper divisors (9736443).

29125221 is a wasteful number, since it uses less digits than its factorization.

29125221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011.

The product of its digits is 720, while the sum is 24.

The square root of 29125221 is about 5396.7787614465. The cubic root of 29125221 is about 307.6732528857.

It can be divided in two parts, 29 and 125221, that added together give a triangular number (125250 = T₅₀₀).

The spelling of 29125221 in words is "twenty-nine million, one hundred twenty-five thousand, two hundred twenty-one".