64521461 has 8 divisors (see below), whose sum is σ = 65823744. Its totient is φ = 63231840.

The previous prime is 64521449. The next prime is 64521467. The reversal of 64521461 is 16412546.

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 64521461 - 2¹⁸ = 64259317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64521467) 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, 7481 + ... + 13601.

It is an arithmetic number, because the mean of its divisors is an integer number (8227968).

Almost surely, 2^64521461 is an apocalyptic number.

It is an amenable number.

64521461 is a deficient number, since it is larger than the sum of its proper divisors (1302283).

64521461 is a wasteful number, since it uses less digits than its factorization.

64521461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331.

The product of its digits is 5760, while the sum is 29.

The square root of 64521461 is about 8032.5251944827. The cubic root of 64521461 is about 401.0834398291.

The spelling of 64521461 in words is "sixty-four million, five hundred twenty-one thousand, four hundred sixty-one".