42521001403 has 4 divisors (see below), whose sum is σ = 42521884480. Its totient is φ = 42520118328.

The previous prime is 42521001389. The next prime is 42521001421. The reversal of 42521001403 is 30410012524.

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

It is a cyclic number.

It is not a de Polignac number, because 42521001403 - 2¹⁷ = 42520870331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42521001463) 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, 364875 + ... + 467092.

It is an arithmetic number, because the mean of its divisors is an integer number (10630471120).

Almost surely, 2^42521001403 is an apocalyptic number.

42521001403 is a deficient number, since it is larger than the sum of its proper divisors (883077).

42521001403 is an equidigital number, since it uses as much as digits as its factorization.

42521001403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883076.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 42521001403 its reverse (30410012524), we get a palindrome (72931013927).

The spelling of 42521001403 in words is "forty-two billion, five hundred twenty-one million, one thousand, four hundred three".