42455823 has 16 divisors (see below), whose sum is σ = 60481920. Its totient is φ = 26411616.

The previous prime is 42455821. The next prime is 42455837. The reversal of 42455823 is 32855424.

It is not a de Polignac number, because 42455823 - 2¹ = 42455821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42455821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1740 + ... + 9377.

It is an arithmetic number, because the mean of its divisors is an integer number (3780120).

Almost surely, 2^42455823 is an apocalyptic number.

42455823 is a deficient number, since it is larger than the sum of its proper divisors (18026097).

42455823 is a wasteful number, since it uses less digits than its factorization.

42455823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11206.

The product of its digits is 38400, while the sum is 33.

The square root of 42455823 is about 6515.8133030344. The cubic root of 42455823 is about 348.8556448228.

It can be divided in two parts, 424558 and 23, that added together give a triangular number (424581 = T₉₂₁).

The spelling of 42455823 in words is "forty-two million, four hundred fifty-five thousand, eight hundred twenty-three".