42901805 has 8 divisors (see below), whose sum is σ = 51614232. Its totient is φ = 34233408.

The previous prime is 42901801. The next prime is 42901843. The reversal of 42901805 is 50810924.

It can be written as a sum of positive squares in 4 ways, for example, as 21548164 + 21353641 = 4642^2 + 4621^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42901805 - 2² = 42901801 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 (42901801) 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, 8822 + ... + 12791.

It is an arithmetic number, because the mean of its divisors is an integer number (6451779).

Almost surely, 2^42901805 is an apocalyptic number.

It is an amenable number.

42901805 is a deficient number, since it is larger than the sum of its proper divisors (8712427).

42901805 is a wasteful number, since it uses less digits than its factorization.

42901805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22015.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 42901805 is about 6549.9469463500. The cubic root of 42901805 is about 350.0729235806.

The spelling of 42901805 in words is "forty-two million, nine hundred one thousand, eight hundred five".