67125257 has 4 divisors (see below), whose sum is σ = 67162260. Its totient is φ = 67088256.

The previous prime is 67125239. The next prime is 67125263. The reversal of 67125257 is 75252176.

It is a happy number.

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 56987401 + 10137856 = 7549^2 + 3184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67125257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97125257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15632 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (16790565).

Almost surely, 2^67125257 is an apocalyptic number.

It is an amenable number.

67125257 is a deficient number, since it is larger than the sum of its proper divisors (37003).

67125257 is a wasteful number, since it uses less digits than its factorization.

67125257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37002.

The product of its digits is 29400, while the sum is 35.

The square root of 67125257 is about 8193.0004882216. Note that the first 3 decimals coincide. The cubic root of 67125257 is about 406.4077556316.

The spelling of 67125257 in words is "sixty-seven million, one hundred twenty-five thousand, two hundred fifty-seven".