67140457 has 4 divisors (see below), whose sum is σ = 67805316. Its totient is φ = 66475600.

The previous prime is 67140449. The next prime is 67140503. The reversal of 67140457 is 75404176.

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 50851161 + 16289296 = 7131^2 + 4036^2 .

It is a cyclic number.

It is not a de Polignac number, because 67140457 - 2³ = 67140449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67141457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332278 + ... + 332479.

It is an arithmetic number, because the mean of its divisors is an integer number (16951329).

Almost surely, 2^67140457 is an apocalyptic number.

It is an amenable number.

67140457 is a deficient number, since it is larger than the sum of its proper divisors (664859).

67140457 is a wasteful number, since it uses less digits than its factorization.

67140457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664858.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 67140457 is about 8193.9280567991. The cubic root of 67140457 is about 406.4384292903.

The spelling of 67140457 in words is "sixty-seven million, one hundred forty thousand, four hundred fifty-seven".