43542101 has 6 divisors (see below), whose sum is σ = 44580150. Its totient is φ = 42527688.

The previous prime is 43542089. The next prime is 43542131. The reversal of 43542101 is 10124534.

It can be written as a sum of positive squares in only one way, i.e., 22372900 + 21169201 = 4730^2 + 4601^2 .

It is not a de Polignac number, because 43542101 - 2²² = 39347797 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 (43542131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9926 + ... + 13623.

It is an arithmetic number, because the mean of its divisors is an integer number (7430025).

Almost surely, 2^43542101 is an apocalyptic number.

It is an amenable number.

43542101 is a deficient number, since it is larger than the sum of its proper divisors (1038049).

43542101 is an equidigital number, since it uses as much as digits as its factorization.

43542101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23635 (or 23592 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 43542101 is about 6598.6438758278. The cubic root of 43542101 is about 351.8059067921.

Adding to 43542101 its reverse (10124534), we get a palindrome (53666635).

The spelling of 43542101 in words is "forty-three million, five hundred forty-two thousand, one hundred one".