42642201 has 12 divisors (see below), whose sum is σ = 66139152. Its totient is φ = 24366888.

The previous prime is 42642179. The next prime is 42642247. The reversal of 42642201 is 10224624.

It is not a de Polignac number, because 42642201 - 2¹⁸ = 42380057 is a prime.

It is a super-2 number, since 2×42642201² = 3636714612248802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42642401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144895 + ... + 145188.

It is an arithmetic number, because the mean of its divisors is an integer number (5511596).

Almost surely, 2^42642201 is an apocalyptic number.

It is an amenable number.

42642201 is a deficient number, since it is larger than the sum of its proper divisors (23496951).

42642201 is a wasteful number, since it uses less digits than its factorization.

42642201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290100 (or 290093 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 42642201 is about 6530.0996163918. The cubic root of 42642201 is about 349.3653833480.

Adding to 42642201 its reverse (10224624), we get a palindrome (52866825).

The spelling of 42642201 in words is "forty-two million, six hundred forty-two thousand, two hundred one".