42005901 has 8 divisors (see below), whose sum is σ = 64009024. Its totient is φ = 24003360.

The previous prime is 42005897. The next prime is 42005917. The reversal of 42005901 is 10950024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42005901 - 2² = 42005897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2000281 = 42005901 / (4 + 2 + 0 + 0 + 5 + 9 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000120 + ... + 1000161.

It is an arithmetic number, because the mean of its divisors is an integer number (8001128).

Almost surely, 2^42005901 is an apocalyptic number.

It is an amenable number.

42005901 is a deficient number, since it is larger than the sum of its proper divisors (22003123).

42005901 is a wasteful number, since it uses less digits than its factorization.

42005901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000291.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 42005901 is about 6481.1959544516. The cubic root of 42005901 is about 347.6189431177.

Adding to 42005901 its reverse (10950024), we get a palindrome (52955925).

It can be divided in two parts, 4200 and 5901, that added together give a palindrome (10101).

The spelling of 42005901 in words is "forty-two million, five thousand, nine hundred one".