42455547 has 6 divisors (see below), whose sum is σ = 61324692. Its totient is φ = 28303692.

The previous prime is 42455537. The next prime is 42455551. The reversal of 42455547 is 74555424.

It is a happy number.

It is not a de Polignac number, because 42455547 - 2⁴ = 42455531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42455527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2358633 + ... + 2358650.

It is an arithmetic number, because the mean of its divisors is an integer number (10220782).

Almost surely, 2^42455547 is an apocalyptic number.

42455547 is a deficient number, since it is larger than the sum of its proper divisors (18869145).

42455547 is a wasteful number, since it uses less digits than its factorization.

42455547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717289 (or 4717286 counting only the distinct ones).

The product of its digits is 112000, while the sum is 36.

The square root of 42455547 is about 6515.7921237559. The cubic root of 42455547 is about 348.8548888655.

The spelling of 42455547 in words is "forty-two million, four hundred fifty-five thousand, five hundred forty-seven".