42240101 has 4 divisors (see below), whose sum is σ = 42835104. Its totient is φ = 41645100.

The previous prime is 42240089. The next prime is 42240103. The reversal of 42240101 is 10104224.

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 not a de Polignac number, because 42240101 - 2²² = 38045797 is a prime.

It is a super-2 number, since 2×42240101² = 3568452264980402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240103) 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, 297395 + ... + 297536.

It is an arithmetic number, because the mean of its divisors is an integer number (10708776).

Almost surely, 2^42240101 is an apocalyptic number.

It is an amenable number.

42240101 is a deficient number, since it is larger than the sum of its proper divisors (595003).

42240101 is an equidigital number, since it uses as much as digits as its factorization.

42240101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595002.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42240101 is about 6499.2384938545. The cubic root of 42240101 is about 348.2637852242.

Adding to 42240101 its reverse (10104224), we get a palindrome (52344325).

The spelling of 42240101 in words is "forty-two million, two hundred forty thousand, one hundred one".