29712145 has 4 divisors (see below), whose sum is σ = 35654580. Its totient is φ = 23769712.

The previous prime is 29712103. The next prime is 29712161. The reversal of 29712145 is 54121792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19465744 + 10246401 = 4412^2 + 3201^2 .

It is a cyclic number.

It is not a de Polignac number, because 29712145 - 2⁷ = 29712017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2971210 + ... + 2971219.

It is an arithmetic number, because the mean of its divisors is an integer number (8913645).

Almost surely, 2^29712145 is an apocalyptic number.

It is an amenable number.

29712145 is a deficient number, since it is larger than the sum of its proper divisors (5942435).

29712145 is an equidigital number, since it uses as much as digits as its factorization.

29712145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942434.

The product of its digits is 5040, while the sum is 31.

The square root of 29712145 is about 5450.8847905638. The cubic root of 29712145 is about 309.7262411470.

The spelling of 29712145 in words is "twenty-nine million, seven hundred twelve thousand, one hundred forty-five".