42005140 has 12 divisors (see below), whose sum is σ = 88210836. Its totient is φ = 16802048.

The previous prime is 42005081. The next prime is 42005167. The reversal of 42005140 is 4150024.

It can be written as a sum of positive squares in 2 ways, for example, as 16744464 + 25260676 = 4092^2 + 5026^2 .

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, 1050109 + ... + 1050148.

It is an arithmetic number, because the mean of its divisors is an integer number (7350903).

Almost surely, 2^42005140 is an apocalyptic number.

It is an amenable number.

42005140 is an abundant number, since it is smaller than the sum of its proper divisors (46205696).

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

42005140 is a wasteful number, since it uses less digits than its factorization.

42005140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100266 (or 2100264 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 42005140 is about 6481.1372458852. The cubic root of 42005140 is about 347.6168438919.

Adding to 42005140 its reverse (4150024), we get a palindrome (46155164).

The spelling of 42005140 in words is "forty-two million, five thousand, one hundred forty".