42547405 has 16 divisors (see below), whose sum is σ = 51865920. Its totient is φ = 33503872.

The previous prime is 42547399. The next prime is 42547433. The reversal of 42547405 is 50474524.

It is a cyclic number.

It is not a de Polignac number, because 42547405 - 2⁹ = 42546893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122442 + ... + 122788.

It is an arithmetic number, because the mean of its divisors is an integer number (3241620).

Almost surely, 2^42547405 is an apocalyptic number.

It is an amenable number.

42547405 is a deficient number, since it is larger than the sum of its proper divisors (9318515).

42547405 is a wasteful number, since it uses less digits than its factorization.

42547405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 42547405 is about 6522.8371894445. The cubic root of 42547405 is about 349.1063050027.

The spelling of 42547405 in words is "forty-two million, five hundred forty-seven thousand, four hundred five".