42153885 has 16 divisors (see below), whose sum is σ = 74940480. Its totient is φ = 22482000.

The previous prime is 42153869. The next prime is 42153887. The reversal of 42153885 is 58835124.

It is a happy number.

42153885 is a `hidden beast` number, since 42 + 1 + 538 + 85 = 666.

It is not a de Polignac number, because 42153885 - 2⁴ = 42153869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42153887) 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, 155991 + ... + 156260.

It is an arithmetic number, because the mean of its divisors is an integer number (4683780).

Almost surely, 2^42153885 is an apocalyptic number.

42153885 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42153885 is a deficient number, since it is larger than the sum of its proper divisors (32786595).

42153885 is a wasteful number, since it uses less digits than its factorization.

42153885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312265 (or 312259 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 42153885 is about 6492.6023288047. The cubic root of 42153885 is about 348.0266775030.

It can be divided in two parts, 4215 and 3885, that added together give a square (8100 = 90²).

The spelling of 42153885 in words is "forty-two million, one hundred fifty-three thousand, eight hundred eighty-five".