42003901 has 4 divisors (see below), whose sum is σ = 42017404. Its totient is φ = 41990400.

The previous prime is 42003877. The next prime is 42003943. The reversal of 42003901 is 10930024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 23522500 = 4299^2 + 4850^2 .

It is a 4-Lehmer number, since φ(42003901) divides (42003901-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 42003901 - 2¹⁷ = 41872829 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 (42000901) 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, 541 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (10504351).

Almost surely, 2^42003901 is an apocalyptic number.

It is an amenable number.

42003901 is a deficient number, since it is larger than the sum of its proper divisors (13503).

42003901 is an equidigital number, since it uses as much as digits as its factorization.

42003901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13502.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 42003901 is about 6481.0416601037. The cubic root of 42003901 is about 347.6134260443.

Adding to 42003901 its reverse (10930024), we get a palindrome (52933925).

The spelling of 42003901 in words is "forty-two million, three thousand, nine hundred one".