64921043 has 8 divisors (see below), whose sum is σ = 74550720. Its totient is φ = 55912680.

The previous prime is 64921009. The next prime is 64921067. The reversal of 64921043 is 34012946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64921043 - 2⁸ = 64920787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64920997 and 64921015.

It is not an unprimeable number, because it can be changed into a prime (64921093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155105 + ... + 155522.

It is an arithmetic number, because the mean of its divisors is an integer number (9318840).

Almost surely, 2^64921043 is an apocalyptic number.

64921043 is a deficient number, since it is larger than the sum of its proper divisors (9629677).

64921043 is a wasteful number, since it uses less digits than its factorization.

64921043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310657.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 64921043 is about 8057.3595550900. The cubic root of 64921043 is about 401.9097076157.

Adding to 64921043 its reverse (34012946), we get a palindrome (98933989).

The spelling of 64921043 in words is "sixty-four million, nine hundred twenty-one thousand, forty-three".