42731349 has 4 divisors (see below), whose sum is σ = 56975136. Its totient is φ = 28487564.

The previous prime is 42731347. The next prime is 42731371. The reversal of 42731349 is 94313724.

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 42731349 - 2¹ = 42731347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42731341) 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, 7121889 + ... + 7121894.

It is an arithmetic number, because the mean of its divisors is an integer number (14243784).

Almost surely, 2^42731349 is an apocalyptic number.

It is an amenable number.

42731349 is a deficient number, since it is larger than the sum of its proper divisors (14243787).

42731349 is a wasteful number, since it uses less digits than its factorization.

42731349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243786.

The product of its digits is 18144, while the sum is 33.

The square root of 42731349 is about 6536.9219820952. The cubic root of 42731349 is about 349.6086755602.

The spelling of 42731349 in words is "forty-two million, seven hundred thirty-one thousand, three hundred forty-nine".