65212740 has 36 divisors (see below), whose sum is σ = 197812524. Its totient is φ = 17390016.

The previous prime is 65212729. The next prime is 65212753. The reversal of 65212740 is 4721256.

65212740 is a `hidden beast` number, since 652 + 1 + 2 + 7 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31270464 + 33942276 = 5592^2 + 5826^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 180967 + ... + 181326.

Almost surely, 2^65212740 is an apocalyptic number.

65212740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65212740 is an abundant number, since it is smaller than the sum of its proper divisors (132599784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65212740 is a wasteful number, since it uses less digits than its factorization.

65212740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362308 (or 362303 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 65212740 is about 8075.4405452582. The cubic root of 65212740 is about 402.5107490410.

Adding to 65212740 its reverse (4721256), we get a palindrome (69933996).

It can be divided in two parts, 6521 and 2740, that added together give a cube (9261 = 21³).

The spelling of 65212740 in words is "sixty-five million, two hundred twelve thousand, seven hundred forty".