42081340 has 24 divisors (see below), whose sum is σ = 100995552. Its totient is φ = 14427840.

The previous prime is 42081317. The next prime is 42081383. The reversal of 42081340 is 4318024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150151 + ... + 150430.

It is an arithmetic number, because the mean of its divisors is an integer number (4208148).

Almost surely, 2^42081340 is an apocalyptic number.

It is an amenable number.

42081340 is an abundant number, since it is smaller than the sum of its proper divisors (58914212).

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

42081340 is a wasteful number, since it uses less digits than its factorization.

42081340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300597 (or 300595 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 42081340 is about 6487.0131801932. The cubic root of 42081340 is about 347.8269166149.

Adding to 42081340 its reverse (4318024), we get a palindrome (46399364).

The spelling of 42081340 in words is "forty-two million, eighty-one thousand, three hundred forty".