65512145 has 16 divisors (see below), whose sum is σ = 81679872. Its totient is φ = 50388480.

The previous prime is 65512129. The next prime is 65512147. The reversal of 65512145 is 54121556.

It is a happy number.

It is not a de Polignac number, because 65512145 - 2⁴ = 65512129 is a prime.

It is a super-2 number, since 2×65512145² = 8583682285002050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65512147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23969 + ... + 26561.

It is an arithmetic number, because the mean of its divisors is an integer number (5104992).

Almost surely, 2^65512145 is an apocalyptic number.

It is an amenable number.

65512145 is a deficient number, since it is larger than the sum of its proper divisors (16167727).

65512145 is a wasteful number, since it uses less digits than its factorization.

65512145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792.

The product of its digits is 6000, while the sum is 29.

The square root of 65512145 is about 8093.9573139472. The cubic root of 65512145 is about 403.1258117084.

The spelling of 65512145 in words is "sixty-five million, five hundred twelve thousand, one hundred forty-five".