65105257 has 8 divisors (see below), whose sum is σ = 78782976. Its totient is φ = 52521792.

The previous prime is 65105207. The next prime is 65105279. The reversal of 65105257 is 75250156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65105257 - 2¹⁵ = 65072489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65105207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273433 + ... + 273670.

It is an arithmetic number, because the mean of its divisors is an integer number (9847872).

Almost surely, 2^65105257 is an apocalyptic number.

It is an amenable number.

65105257 is a deficient number, since it is larger than the sum of its proper divisors (13677719).

65105257 is a wasteful number, since it uses less digits than its factorization.

65105257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547127.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 65105257 is about 8068.7828698014. The cubic root of 65105257 is about 402.2894893444.

The spelling of 65105257 in words is "sixty-five million, one hundred five thousand, two hundred fifty-seven".