42406311 has 4 divisors (see below), whose sum is σ = 56541752. Its totient is φ = 28270872.

The previous prime is 42406297. The next prime is 42406327. The reversal of 42406311 is 11360424.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42406311 - 2¹⁰ = 42405287 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 (42406391) 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, 7067716 + ... + 7067721.

It is an arithmetic number, because the mean of its divisors is an integer number (14135438).

Almost surely, 2^42406311 is an apocalyptic number.

42406311 is a deficient number, since it is larger than the sum of its proper divisors (14135441).

42406311 is a wasteful number, since it uses less digits than its factorization.

42406311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14135440.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 42406311 is about 6512.0128224689. The cubic root of 42406311 is about 348.7199802014.

Adding to 42406311 its reverse (11360424), we get a palindrome (53766735).

The spelling of 42406311 in words is "forty-two million, four hundred six thousand, three hundred eleven".