42211249 has 4 divisors (see below), whose sum is σ = 42226164. Its totient is φ = 42196336.

The previous prime is 42211219. The next prime is 42211259. The reversal of 42211249 is 94211224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 40094224 = 1455^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 42211249 - 2²¹ = 40114097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42211219) 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, 1762 + ... + 9355.

It is an arithmetic number, because the mean of its divisors is an integer number (10556541).

Almost surely, 2^42211249 is an apocalyptic number.

It is an amenable number.

42211249 is a deficient number, since it is larger than the sum of its proper divisors (14915).

42211249 is a wasteful number, since it uses less digits than its factorization.

42211249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14914.

The product of its digits is 1152, while the sum is 25.

The square root of 42211249 is about 6497.0184700369. The cubic root of 42211249 is about 348.1844735816.

Subtracting from 42211249 its sum of digits (25), we obtain a palindrome (42211224).

The spelling of 42211249 in words is "forty-two million, two hundred eleven thousand, two hundred forty-nine".