43642541 has 4 divisors (see below), whose sum is σ = 43716000. Its totient is φ = 43569084.

The previous prime is 43642507. The next prime is 43642559. The reversal of 43642541 is 14524634.

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 43642541 - 2¹⁸ = 43380397 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 (43642561) 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, 35831 + ... + 37028.

It is an arithmetic number, because the mean of its divisors is an integer number (10929000).

Almost surely, 2^43642541 is an apocalyptic number.

It is an amenable number.

43642541 is a deficient number, since it is larger than the sum of its proper divisors (73459).

43642541 is an equidigital number, since it uses as much as digits as its factorization.

43642541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73458.

The product of its digits is 11520, while the sum is 29.

The square root of 43642541 is about 6606.2501466414. The cubic root of 43642541 is about 352.0762064903.

The spelling of 43642541 in words is "forty-three million, six hundred forty-two thousand, five hundred forty-one".