42655545 has 16 divisors (see below), whose sum is σ = 75832320. Its totient is φ = 22749552.

The previous prime is 42655541. The next prime is 42655553. The reversal of 42655545 is 54555624.

42655545 is a `hidden beast` number, since 42 + 65 + 554 + 5 = 666.

It is not a de Polignac number, because 42655545 - 2² = 42655541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42655541) 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, 157849 + ... + 158118.

It is an arithmetic number, because the mean of its divisors is an integer number (4739520).

Almost surely, 2^42655545 is an apocalyptic number.

42655545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42655545 is a deficient number, since it is larger than the sum of its proper divisors (33176775).

42655545 is a wasteful number, since it uses less digits than its factorization.

42655545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315981 (or 315975 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 42655545 is about 6531.1212666739. The cubic root of 42655545 is about 349.4018217850.

The spelling of 42655545 in words is "forty-two million, six hundred fifty-five thousand, five hundred forty-five".