42549415 has 4 divisors (see below), whose sum is σ = 51059304. Its totient is φ = 34039528.

The previous prime is 42549413. The next prime is 42549421. The reversal of 42549415 is 51494524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42549415 - 2¹ = 42549413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42549413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4254937 + ... + 4254946.

It is an arithmetic number, because the mean of its divisors is an integer number (12764826).

Almost surely, 2^42549415 is an apocalyptic number.

42549415 is a deficient number, since it is larger than the sum of its proper divisors (8509889).

42549415 is an equidigital number, since it uses as much as digits as its factorization.

42549415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509888.

The product of its digits is 28800, while the sum is 34.

The square root of 42549415 is about 6522.9912616836. The cubic root of 42549415 is about 349.1118023425. Note that the first 3 decimals are identical.

The spelling of 42549415 in words is "forty-two million, five hundred forty-nine thousand, four hundred fifteen".