42851061 has 54 divisors (see below), whose sum is σ = 72462390. Its totient is φ = 24377760.

The previous prime is 42851057. The next prime is 42851063. The reversal of 42851061 is 16015824.

It can be written as a sum of positive squares in only one way, i.e., 39312900 + 3538161 = 6270^2 + 1881^2 .

It is not a de Polignac number, because 42851061 - 2² = 42851057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42851063) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 393075 + ... + 393183.

Almost surely, 2^42851061 is an apocalyptic number.

It is an amenable number.

42851061 is a deficient number, since it is larger than the sum of its proper divisors (29611329).

42851061 is a wasteful number, since it uses less digits than its factorization.

42851061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 42851061 is about 6546.0721810869. The cubic root of 42851061 is about 349.9348477366.

Adding to 42851061 its reverse (16015824), we get a palindrome (58866885).

The spelling of 42851061 in words is "forty-two million, eight hundred fifty-one thousand, sixty-one".