42511444 has 12 divisors (see below), whose sum is σ = 74506068. Its totient is φ = 21224000.

The previous prime is 42511439. The next prime is 42511451. The reversal of 42511444 is 44411524.

It can be written as a sum of positive squares in 2 ways, for example, as 30691600 + 11819844 = 5540^2 + 3438^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4777 + ... + 10384.

It is an arithmetic number, because the mean of its divisors is an integer number (6208839).

Almost surely, 2^42511444 is an apocalyptic number.

It is an amenable number.

42511444 is a deficient number, since it is larger than the sum of its proper divisors (31994624).

42511444 is a wasteful number, since it uses less digits than its factorization.

42511444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15866 (or 15864 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 42511444 is about 6520.0800608581. The cubic root of 42511444 is about 349.0079225794.

Adding to 42511444 its reverse (44411524), we get a palindrome (86922968).

The spelling of 42511444 in words is "forty-two million, five hundred eleven thousand, four hundred forty-four".