42021140 has 24 divisors (see below), whose sum is σ = 100851072. Its totient is φ = 14407200.

The previous prime is 42021139. The next prime is 42021143. The reversal of 42021140 is 4112024.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021143) 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, 149936 + ... + 150215.

It is an arithmetic number, because the mean of its divisors is an integer number (4202128).

Almost surely, 2^42021140 is an apocalyptic number.

It is an amenable number.

42021140 is an abundant number, since it is smaller than the sum of its proper divisors (58829932).

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

42021140 is a wasteful number, since it uses less digits than its factorization.

42021140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300167 (or 300165 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42021140 is about 6482.3714796361. The cubic root of 42021140 is about 347.6609747092.

Adding to 42021140 its reverse (4112024), we get a palindrome (46133164).

The spelling of 42021140 in words is "forty-two million, twenty-one thousand, one hundred forty".