42421044 has 12 divisors (see below), whose sum is σ = 98982464. Its totient is φ = 14140344.

The previous prime is 42421037. The next prime is 42421063. The reversal of 42421044 is 44012424.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42421044.

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, 1767532 + ... + 1767555.

Almost surely, 2^42421044 is an apocalyptic number.

It is an amenable number.

42421044 is an abundant number, since it is smaller than the sum of its proper divisors (56561420).

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

42421044 is a wasteful number, since it uses less digits than its factorization.

42421044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535094 (or 3535092 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 42421044 is about 6513.1439412929. The cubic root of 42421044 is about 348.7603601706.

Adding to 42421044 its reverse (44012424), we get a palindrome (86433468).

The spelling of 42421044 in words is "forty-two million, four hundred twenty-one thousand, forty-four".