43020101 has 4 divisors (see below), whose sum is σ = 43284192. Its totient is φ = 42756012.

The previous prime is 43020077. The next prime is 43020127. The reversal of 43020101 is 10102034.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-43020101 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 (43020151) 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, 131801 + ... + 132126.

It is an arithmetic number, because the mean of its divisors is an integer number (10821048).

Almost surely, 2^43020101 is an apocalyptic number.

It is an amenable number.

43020101 is a deficient number, since it is larger than the sum of its proper divisors (264091).

43020101 is a wasteful number, since it uses less digits than its factorization.

43020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264090.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 43020101 is about 6558.9710321056. The cubic root of 43020101 is about 350.3943880805.

Adding to 43020101 its reverse (10102034), we get a palindrome (53122135).

The spelling of 43020101 in words is "forty-three million, twenty thousand, one hundred one".