42621544 has 32 divisors (see below), whose sum is σ = 91768320. Its totient is φ = 18179136.

The previous prime is 42621539. The next prime is 42621547. The reversal of 42621544 is 44512624.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (42621547) 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 7 ways as a sum of consecutive naturals, for example, 10782 + ... + 14194.

It is an arithmetic number, because the mean of its divisors is an integer number (2867760).

Almost surely, 2^42621544 is an apocalyptic number.

It is an amenable number.

42621544 is an abundant number, since it is smaller than the sum of its proper divisors (49146776).

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

42621544 is a wasteful number, since it uses less digits than its factorization.

42621544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649 (or 3645 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 42621544 is about 6528.5177490760. The cubic root of 42621544 is about 349.3089603194.

The spelling of 42621544 in words is "forty-two million, six hundred twenty-one thousand, five hundred forty-four".