65151257 has 4 divisors (see below), whose sum is σ = 66380580. Its totient is φ = 63921936.

The previous prime is 65151211. The next prime is 65151271. The reversal of 65151257 is 75215156.

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 32672656 + 32478601 = 5716^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 65151257 - 2¹⁸ = 64889113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65151277) 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, 614582 + ... + 614687.

It is an arithmetic number, because the mean of its divisors is an integer number (16595145).

Almost surely, 2^65151257 is an apocalyptic number.

It is an amenable number.

65151257 is a deficient number, since it is larger than the sum of its proper divisors (1229323).

65151257 is a wasteful number, since it uses less digits than its factorization.

65151257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229322.

The product of its digits is 10500, while the sum is 32.

The square root of 65151257 is about 8071.6328583503. The cubic root of 65151257 is about 402.3842126728.

The spelling of 65151257 in words is "sixty-five million, one hundred fifty-one thousand, two hundred fifty-seven".