65121030 has 64 divisors (see below), whose sum is σ = 187024320. Its totient is φ = 16028928.

The previous prime is 65120969. The next prime is 65121031. The reversal of 65121030 is 3012156.

65121030 is a `hidden beast` number, since 651 + 2 + 10 + 3 + 0 = 666.

65121030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 65120994 and 65121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5767 + ... + 12786.

It is an arithmetic number, because the mean of its divisors is an integer number (2922255).

Almost surely, 2^65121030 is an apocalyptic number.

65121030 is an abundant number, since it is smaller than the sum of its proper divisors (121903290).

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

65121030 is a wasteful number, since it uses less digits than its factorization.

65121030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18582 (or 18576 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 65121030 is about 8069.7602194861. The cubic root of 65121030 is about 402.3219741751.

Adding to 65121030 its reverse (3012156), we get a palindrome (68133186).

The spelling of 65121030 in words is "sixty-five million, one hundred twenty-one thousand, thirty".