42015444 has 12 divisors (see below), whose sum is σ = 98036064. Its totient is φ = 14005144.

The previous prime is 42015443. The next prime is 42015469. The reversal of 42015444 is 44451024.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42015443) 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, 1750632 + ... + 1750655.

It is an arithmetic number, because the mean of its divisors is an integer number (8169672).

Almost surely, 2^42015444 is an apocalyptic number.

It is an amenable number.

42015444 is an abundant number, since it is smaller than the sum of its proper divisors (56020620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42015444 is a wasteful number, since it uses less digits than its factorization.

42015444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501294 (or 3501292 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 42015444 is about 6481.9321193607. The cubic root of 42015444 is about 347.6452654226.

Adding to 42015444 its reverse (44451024), we get a palindrome (86466468).

The spelling of 42015444 in words is "forty-two million, fifteen thousand, four hundred forty-four".