42239649 has 4 divisors (see below), whose sum is σ = 56319536. Its totient is φ = 28159764.

The previous prime is 42239647. The next prime is 42239651. The reversal of 42239649 is 94693224.

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 an interprime number because it is at equal distance from previous prime (42239647) and next prime (42239651).

It is not a de Polignac number, because 42239649 - 2¹ = 42239647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42239647) 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, 7039939 + ... + 7039944.

It is an arithmetic number, because the mean of its divisors is an integer number (14079884).

Almost surely, 2^42239649 is an apocalyptic number.

It is an amenable number.

42239649 is a deficient number, since it is larger than the sum of its proper divisors (14079887).

42239649 is a wasteful number, since it uses less digits than its factorization.

42239649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14079886.

The product of its digits is 93312, while the sum is 39.

The square root of 42239649 is about 6499.2037204568. The cubic root of 42239649 is about 348.2625429939.

The spelling of 42239649 in words is "forty-two million, two hundred thirty-nine thousand, six hundred forty-nine".