65140457 has 4 divisors (see below), whose sum is σ = 65250900. Its totient is φ = 65030016.

The previous prime is 65140451. The next prime is 65140463. The reversal of 65140457 is 75404156.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (65140451) and next prime (65140463).

It can be written as a sum of positive squares in 2 ways, for example, as 21196816 + 43943641 = 4604^2 + 6629^2 .

It is a cyclic number.

It is not a de Polignac number, because 65140457 - 2¹⁸ = 64878313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65140451) 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 3 ways as a sum of consecutive naturals, for example, 54332 + ... + 55517.

It is an arithmetic number, because the mean of its divisors is an integer number (16312725).

Almost surely, 2^65140457 is an apocalyptic number.

It is an amenable number.

65140457 is a deficient number, since it is larger than the sum of its proper divisors (110443).

65140457 is a wasteful number, since it uses less digits than its factorization.

65140457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110442.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 65140457 is about 8070.9638210068. The cubic root of 65140457 is about 402.3619772888.

The spelling of 65140457 in words is "sixty-five million, one hundred forty thousand, four hundred fifty-seven".