57129147 has 12 divisors (see below), whose sum is σ = 84750640. Its totient is φ = 37056528.

The previous prime is 57129131. The next prime is 57129151. The reversal of 57129147 is 74192175.

It is a happy number.

It is not a de Polignac number, because 57129147 - 2⁴ = 57129131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57129047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85447 + ... + 86112.

Almost surely, 2^57129147 is an apocalyptic number.

57129147 is a deficient number, since it is larger than the sum of its proper divisors (27621493).

57129147 is a wasteful number, since it uses less digits than its factorization.

57129147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171602 (or 171599 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 57129147 is about 7558.3825650730. The cubic root of 57129147 is about 385.1405502466.

The spelling of 57129147 in words is "fifty-seven million, one hundred twenty-nine thousand, one hundred forty-seven".