42238949 has 4 divisors (see below), whose sum is σ = 42747936. Its totient is φ = 41729964.

The previous prime is 42238927. The next prime is 42238969. The reversal of 42238949 is 94983224.

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 a de Polignac number, because none of the positive numbers 2^k-42238949 is a prime.

It is a super-3 number, since 3×42238949³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42238969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254369 + ... + 254534.

It is an arithmetic number, because the mean of its divisors is an integer number (10686984).

Almost surely, 2^42238949 is an apocalyptic number.

It is an amenable number.

42238949 is a deficient number, since it is larger than the sum of its proper divisors (508987).

42238949 is an equidigital number, since it uses as much as digits as its factorization.

42238949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508986.

The product of its digits is 124416, while the sum is 41.

The square root of 42238949 is about 6499.1498674827. The cubic root of 42238949 is about 348.2606191685.

The spelling of 42238949 in words is "forty-two million, two hundred thirty-eight thousand, nine hundred forty-nine".