42401345 has 16 divisors (see below), whose sum is σ = 58326528. Its totient is φ = 28987200.

The previous prime is 42401321. The next prime is 42401347. The reversal of 42401345 is 54310424.

42401345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42401345 - 2¹⁰ = 42400321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42401345.

It is not an unprimeable number, because it can be changed into a prime (42401347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11195 + ... + 14495.

It is an arithmetic number, because the mean of its divisors is an integer number (3645408).

Almost surely, 2^42401345 is an apocalyptic number.

It is an amenable number.

42401345 is a deficient number, since it is larger than the sum of its proper divisors (15925183).

42401345 is a wasteful number, since it uses less digits than its factorization.

42401345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42401345 is about 6511.6315159874. The cubic root of 42401345 is about 348.7063673611.

Adding to 42401345 its reverse (54310424), we get a palindrome (96711769).

The spelling of 42401345 in words is "forty-two million, four hundred one thousand, three hundred forty-five".