29681225 has 12 divisors (see below), whose sum is σ = 42062784. Its totient is φ = 20352720.

The previous prime is 29681221. The next prime is 29681227. The reversal of 29681225 is 52218692.

It is a happy number.

It is not a de Polignac number, because 29681225 - 2² = 29681221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29681221) 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, 84629 + ... + 84978.

It is an arithmetic number, because the mean of its divisors is an integer number (3505232).

Almost surely, 2^29681225 is an apocalyptic number.

29681225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

29681225 is a deficient number, since it is larger than the sum of its proper divisors (12381559).

29681225 is a wasteful number, since it uses less digits than its factorization.

29681225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169624 (or 169619 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 29681225 is about 5448.0478155024. The cubic root of 29681225 is about 309.6187647900.

The spelling of 29681225 in words is "twenty-nine million, six hundred eighty-one thousand, two hundred twenty-five".