42552101 has 4 divisors (see below), whose sum is σ = 42807072. Its totient is φ = 42297132.

The previous prime is 42552089. The next prime is 42552121. The reversal of 42552101 is 10125524.

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-42552101 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 (42552121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127235 + ... + 127568.

It is an arithmetic number, because the mean of its divisors is an integer number (10701768).

Almost surely, 2^42552101 is an apocalyptic number.

It is an amenable number.

42552101 is a deficient number, since it is larger than the sum of its proper divisors (254971).

42552101 is a wasteful number, since it uses less digits than its factorization.

42552101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254970.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 42552101 is about 6523.1971455721. The cubic root of 42552101 is about 349.1191482685.

Adding to 42552101 its reverse (10125524), we get a palindrome (52677625).

The spelling of 42552101 in words is "forty-two million, five hundred fifty-two thousand, one hundred one".