42198001 has 2 divisors, whose sum is σ = 42198002. Its totient is φ = 42198000.

The previous prime is 42197999. The next prime is 42198011. The reversal of 42198001 is 10089124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41589601 + 608400 = 6449^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 42198001 - 2¹ = 42197999 is a prime.

Together with 42197999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42198011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21099000 + 21099001.

It is an arithmetic number, because the mean of its divisors is an integer number (21099001).

Almost surely, 2^42198001 is an apocalyptic number.

It is an amenable number.

42198001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42198001 is an equidigital number, since it uses as much as digits as its factorization.

42198001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 42198001 is about 6495.9988454432. The cubic root of 42198001 is about 348.1480438725.

The spelling of 42198001 in words is "forty-two million, one hundred ninety-eight thousand, one".