42000401 has 4 divisors (see below), whose sum is σ = 42111600. Its totient is φ = 41889204.

The previous prime is 42000383. The next prime is 42000419. The reversal of 42000401 is 10400024.

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 an interprime number because it is at equal distance from previous prime (42000383) and next prime (42000419).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42000401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42000701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55031 + ... + 55788.

It is an arithmetic number, because the mean of its divisors is an integer number (10527900).

Almost surely, 2^42000401 is an apocalyptic number.

It is an amenable number.

42000401 is a deficient number, since it is larger than the sum of its proper divisors (111199).

42000401 is a wasteful number, since it uses less digits than its factorization.

42000401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111198.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 42000401 is about 6480.7716361557. The cubic root of 42000401 is about 347.6037707444.

Adding to 42000401 its reverse (10400024), we get a palindrome (52400425).

The spelling of 42000401 in words is "forty-two million, four hundred one", and thus it is an aban number.