42070545 has 24 divisors (see below), whose sum is σ = 79552512. Its totient is φ = 20397600.

The previous prime is 42070543. The next prime is 42070547. The reversal of 42070545 is 54507024.

It is an interprime number because it is at equal distance from previous prime (42070543) and next prime (42070547).

It is not a de Polignac number, because 42070545 - 2¹ = 42070543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42070543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42001 + ... + 42990.

It is an arithmetic number, because the mean of its divisors is an integer number (3314688).

Almost surely, 2^42070545 is an apocalyptic number.

42070545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42070545 is a deficient number, since it is larger than the sum of its proper divisors (37481967).

42070545 is a wasteful number, since it uses less digits than its factorization.

42070545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85013 (or 85010 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 42070545 is about 6486.1810798034. The cubic root of 42070545 is about 347.7971717392.

Adding to 42070545 its reverse (54507024), we get a palindrome (96577569).

The spelling of 42070545 in words is "forty-two million, seventy thousand, five hundred forty-five".