67129425 has 48 divisors (see below), whose sum is σ = 134544960. Its totient is φ = 32544000.

The previous prime is 67129421. The next prime is 67129427. The reversal of 67129425 is 52492176.

It is not a de Polignac number, because 67129425 - 2² = 67129421 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 67129425.

It is not an unprimeable number, because it can be changed into a prime (67129421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2905 + ... + 11945.

It is an arithmetic number, because the mean of its divisors is an integer number (2803020).

Almost surely, 2^67129425 is an apocalyptic number.

It is an amenable number.

67129425 is an abundant number, since it is smaller than the sum of its proper divisors (67415535).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67129425 is a wasteful number, since it uses less digits than its factorization.

67129425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9071 (or 9060 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 67129425 is about 8193.2548477391. The cubic root of 67129425 is about 406.4161671324.

The spelling of 67129425 in words is "sixty-seven million, one hundred twenty-nine thousand, four hundred twenty-five".