42127845 has 32 divisors (see below), whose sum is σ = 72316800. Its totient is φ = 20876544.

The previous prime is 42127843. The next prime is 42127861. The reversal of 42127845 is 54872124.

It is not a de Polignac number, because 42127845 - 2¹ = 42127843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42127843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13711 + ... + 16499.

It is an arithmetic number, because the mean of its divisors is an integer number (2259900).

Almost surely, 2^42127845 is an apocalyptic number.

It is an amenable number.

42127845 is a deficient number, since it is larger than the sum of its proper divisors (30188955).

42127845 is a wasteful number, since it uses less digits than its factorization.

42127845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869.

The product of its digits is 17920, while the sum is 33.

The square root of 42127845 is about 6490.5966597841. The cubic root of 42127845 is about 347.9549997962.

Adding to 42127845 its reverse (54872124), we get a palindrome (96999969).

The spelling of 42127845 in words is "forty-two million, one hundred twenty-seven thousand, eight hundred forty-five".