42129273 has 16 divisors (see below), whose sum is σ = 57882816. Its totient is φ = 27236160.

The previous prime is 42129259. The next prime is 42129287. The reversal of 42129273 is 37292124.

It is an interprime number because it is at equal distance from previous prime (42129259) and next prime (42129287).

It is not a de Polignac number, because 42129273 - 2⁶ = 42129209 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42129273.

It is not an unprimeable number, because it can be changed into a prime (42129233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54115 + ... + 54887.

It is an arithmetic number, because the mean of its divisors is an integer number (3617676).

Almost surely, 2^42129273 is an apocalyptic number.

It is an amenable number.

42129273 is a deficient number, since it is larger than the sum of its proper divisors (15753543).

42129273 is a wasteful number, since it uses less digits than its factorization.

42129273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304.

The product of its digits is 6048, while the sum is 30.

The square root of 42129273 is about 6490.7066641468. The cubic root of 42129273 is about 347.9589312745.

The spelling of 42129273 in words is "forty-two million, one hundred twenty-nine thousand, two hundred seventy-three".