42403501 has 4 divisors (see below), whose sum is σ = 48461152. Its totient is φ = 36345852.

The previous prime is 42403499. The next prime is 42403519. The reversal of 42403501 is 10530424.

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 a cyclic number.

It is not a de Polignac number, because 42403501 - 2¹ = 42403499 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 (42403531) 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, 3028815 + ... + 3028828.

It is an arithmetic number, because the mean of its divisors is an integer number (12115288).

Almost surely, 2^42403501 is an apocalyptic number.

It is an amenable number.

42403501 is a deficient number, since it is larger than the sum of its proper divisors (6057651).

42403501 is an equidigital number, since it uses as much as digits as its factorization.

42403501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6057650.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42403501 is about 6511.7970637912. The cubic root of 42403501 is about 348.7122775367.

Adding to 42403501 its reverse (10530424), we get a palindrome (52933925).

The spelling of 42403501 in words is "forty-two million, four hundred three thousand, five hundred one".