42021948 has 24 divisors (see below), whose sum is σ = 100138752. Its totient is φ = 13709104.

The previous prime is 42021923. The next prime is 42021949. The reversal of 42021948 is 84912024.

It is a super-2 number, since 2×42021948² = 3531688227429408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36690 + ... + 37817.

It is an arithmetic number, because the mean of its divisors is an integer number (4172448).

Almost surely, 2^42021948 is an apocalyptic number.

It is an amenable number.

42021948 is an abundant number, since it is smaller than the sum of its proper divisors (58116804).

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

42021948 is a wasteful number, since it uses less digits than its factorization.

42021948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74561 (or 74559 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 42021948 is about 6482.4338022073. The cubic root of 42021948 is about 347.6632030183.

The spelling of 42021948 in words is "forty-two million, twenty-one thousand, nine hundred forty-eight".