42049801 has 4 divisors (see below), whose sum is σ = 42739204. Its totient is φ = 41360400.

The previous prime is 42049783. The next prime is 42049817. The reversal of 42049801 is 10894024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23765625 + 18284176 = 4875^2 + 4276^2 .

It is a cyclic number.

It is not a de Polignac number, because 42049801 - 2⁵ = 42049769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42049801.

It is not an unprimeable number, because it can be changed into a prime (42049001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344610 + ... + 344731.

It is an arithmetic number, because the mean of its divisors is an integer number (10684801).

Almost surely, 2^42049801 is an apocalyptic number.

It is an amenable number.

42049801 is a deficient number, since it is larger than the sum of its proper divisors (689403).

42049801 is an equidigital number, since it uses as much as digits as its factorization.

42049801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689402.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42049801 is about 6484.5817906786. The cubic root of 42049801 is about 347.7399987959.

The spelling of 42049801 in words is "forty-two million, forty-nine thousand, eight hundred one".