42240401 has 24 divisors (see below), whose sum is σ = 52668000. Its totient is φ = 33675264.

The previous prime is 42240391. The next prime is 42240409. The reversal of 42240401 is 10404224.

It is a de Polignac number, because none of the positive numbers 2^k-42240401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42240401.

It is not an unprimeable number, because it can be changed into a prime (42240409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54545 + ... + 55313.

It is an arithmetic number, because the mean of its divisors is an integer number (2194500).

Almost surely, 2^42240401 is an apocalyptic number.

It is an amenable number.

42240401 is a deficient number, since it is larger than the sum of its proper divisors (10427599).

42240401 is a wasteful number, since it uses less digits than its factorization.

42240401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42240401 is about 6499.2615734405. The cubic root of 42240401 is about 348.2646097084.

Adding to 42240401 its reverse (10404224), we get a palindrome (52644625).

The spelling of 42240401 in words is "forty-two million, two hundred forty thousand, four hundred one".