43485621 has 4 divisors (see below), whose sum is σ = 57980832. Its totient is φ = 28990412.

The previous prime is 43485577. The next prime is 43485641. The reversal of 43485621 is 12658434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43485621 - 2¹⁵ = 43452853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43485641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7247601 + ... + 7247606.

It is an arithmetic number, because the mean of its divisors is an integer number (14495208).

Almost surely, 2^43485621 is an apocalyptic number.

It is an amenable number.

43485621 is a deficient number, since it is larger than the sum of its proper divisors (14495211).

43485621 is a wasteful number, since it uses less digits than its factorization.

43485621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14495210.

The product of its digits is 23040, while the sum is 33.

The square root of 43485621 is about 6594.3628198636. The cubic root of 43485621 is about 351.6537276772.

The spelling of 43485621 in words is "forty-three million, four hundred eighty-five thousand, six hundred twenty-one".