42564949 has 4 divisors (see below), whose sum is σ = 48645664. Its totient is φ = 36484236.

The previous prime is 42564931. The next prime is 42564983. The reversal of 42564949 is 94946524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42564949 - 2¹¹ = 42562901 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 (42564349) 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, 3040347 + ... + 3040360.

It is an arithmetic number, because the mean of its divisors is an integer number (12161416).

Almost surely, 2^42564949 is an apocalyptic number.

It is an amenable number.

42564949 is a deficient number, since it is larger than the sum of its proper divisors (6080715).

42564949 is an equidigital number, since it uses as much as digits as its factorization.

42564949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080714.

The product of its digits is 311040, while the sum is 43.

The square root of 42564949 is about 6524.1818644179. The cubic root of 42564949 is about 349.1542819153.

The spelling of 42564949 in words is "forty-two million, five hundred sixty-four thousand, nine hundred forty-nine".