42549405 has 8 divisors (see below), whose sum is σ = 68079072. Its totient is φ = 22693008.

The previous prime is 42549401. The next prime is 42549413. The reversal of 42549405 is 50494524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42549405 - 2² = 42549401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42549401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1418299 + ... + 1418328.

It is an arithmetic number, because the mean of its divisors is an integer number (8509884).

Almost surely, 2^42549405 is an apocalyptic number.

It is an amenable number.

42549405 is a deficient number, since it is larger than the sum of its proper divisors (25529667).

42549405 is a wasteful number, since it uses less digits than its factorization.

42549405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836635.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 42549405 is about 6522.9904951640. The cubic root of 42549405 is about 349.1117749930. Note that the first 3 decimals are identical.

The spelling of 42549405 in words is "forty-two million, five hundred forty-nine thousand, four hundred five".