42081770 has 24 divisors (see below), whose sum is σ = 79950564. Its totient is φ = 15945408.

The previous prime is 42081719. The next prime is 42081773. The reversal of 42081770 is 7718024.

It can be written as a sum of positive squares in 2 ways, for example, as 41977441 + 104329 = 6479^2 + 323^2 .

It is not an unprimeable number, because it can be changed into a prime (42081773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2219 + ... + 9438.

Almost surely, 2^42081770 is an apocalyptic number.

42081770 is a deficient number, since it is larger than the sum of its proper divisors (37868794).

42081770 is a wasteful number, since it uses less digits than its factorization.

42081770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11702 (or 11683 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 42081770 is about 6487.0463232507. The cubic root of 42081770 is about 347.8281013448.

Adding to 42081770 its reverse (7718024), we get a palindrome (49799794).

The spelling of 42081770 in words is "forty-two million, eighty-one thousand, seven hundred seventy".