64031121 has 64 divisors (see below), whose sum is σ = 124569600. Its totient is φ = 31492800.

The previous prime is 64031119. The next prime is 64031167. The reversal of 64031121 is 12113046.

It is a happy number.

64031121 is a `hidden beast` number, since 640 + 3 + 1 + 1 + 21 = 666.

It is not a de Polignac number, because 64031121 - 2¹ = 64031119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64031094 and 64031103.

It is not an unprimeable number, because it can be changed into a prime (64031021) 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 63 ways as a sum of consecutive naturals, for example, 38691 + ... + 40311.

It is an arithmetic number, because the mean of its divisors is an integer number (1946400).

Almost surely, 2^64031121 is an apocalyptic number.

It is an amenable number.

64031121 is a deficient number, since it is larger than the sum of its proper divisors (60538479).

64031121 is a wasteful number, since it uses less digits than its factorization.

64031121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 64031121 is about 8001.9448261032. The cubic root of 64031121 is about 400.0648249104.

Adding to 64031121 its reverse (12113046), we get a palindrome (76144167).

The spelling of 64031121 in words is "sixty-four million, thirty-one thousand, one hundred twenty-one".