42549967 has 4 divisors (see below), whose sum is σ = 42602616. Its totient is φ = 42497320.

The previous prime is 42549907. The next prime is 42549973. The reversal of 42549967 is 76994524.

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 42549967 - 2²³ = 34161359 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 (42549907) 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, 25093 + ... + 26734.

It is an arithmetic number, because the mean of its divisors is an integer number (10650654).

Almost surely, 2^42549967 is an apocalyptic number.

42549967 is a deficient number, since it is larger than the sum of its proper divisors (52649).

42549967 is an equidigital number, since it uses as much as digits as its factorization.

42549967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52648.

The product of its digits is 544320, while the sum is 46.

The square root of 42549967 is about 6523.0335734227. The cubic root of 42549967 is about 349.1133120294.

The spelling of 42549967 in words is "forty-two million, five hundred forty-nine thousand, nine hundred sixty-seven".