42247144 has 16 divisors (see below), whose sum is σ = 80299620. Its totient is φ = 20833920.

The previous prime is 42247133. The next prime is 42247147. The reversal of 42247144 is 44174224.

It can be written as a sum of positive squares in 2 ways, for example, as 39564100 + 2683044 = 6290^2 + 1638^2 .

It is not an unprimeable number, because it can be changed into a prime (42247147) 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, 35587 + ... + 36754.

Almost surely, 2^42247144 is an apocalyptic number.

It is an amenable number.

42247144 is a deficient number, since it is larger than the sum of its proper divisors (38052476).

42247144 is a wasteful number, since it uses less digits than its factorization.

42247144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72420 (or 72416 counting only the distinct ones).

The product of its digits is 7168, while the sum is 28.

The square root of 42247144 is about 6499.7803039795. The cubic root of 42247144 is about 348.2831403351.

The spelling of 42247144 in words is "forty-two million, two hundred forty-seven thousand, one hundred forty-four".