42070 has 16 divisors (see below), whose sum is σ = 86688. Its totient is φ = 14400.

The previous prime is 42061. The next prime is 42071. The reversal of 42070 is 7024.

42070 = 36² + 37² + ... + 55².

It is a self number, because there is not a number n which added to its sum of digits gives 42070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231 + ... + 370.

It is an arithmetic number, because the mean of its divisors is an integer number (5418).

2⁴²⁰⁷⁰ is an apocalyptic number.

42070 is an abundant number, since it is smaller than the sum of its proper divisors (44618).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43344).

42070 is a wasteful number, since it uses less digits than its factorization.

42070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615.

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 42070 is about 205.1097267318. The cubic root of 42070 is about 34.7795669894.

Adding to 42070 its reverse (7024), we get a palindrome (49094).

The spelling of 42070 in words is "forty-two thousand, seventy", and thus it is an iban number.