42221245 has 32 divisors (see below), whose sum is σ = 57957120. Its totient is φ = 29245440.

The previous prime is 42221243. The next prime is 42221269. The reversal of 42221245 is 54212224.

It is not a de Polignac number, because 42221245 - 2¹ = 42221243 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164157 + ... + 164413.

It is an arithmetic number, because the mean of its divisors is an integer number (1811160).

Almost surely, 2^42221245 is an apocalyptic number.

It is an amenable number.

42221245 is a deficient number, since it is larger than the sum of its proper divisors (15735875).

42221245 is a wasteful number, since it uses less digits than its factorization.

42221245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405.

The product of its digits is 1280, while the sum is 22.

The square root of 42221245 is about 6497.7877004408. The cubic root of 42221245 is about 348.2119558080.

Adding to 42221245 its reverse (54212224), we get a palindrome (96433469).

The spelling of 42221245 in words is "forty-two million, two hundred twenty-one thousand, two hundred forty-five".