2002501421 has 4 divisors (see below), whose sum is σ = 2011481472. Its totient is φ = 1993521372.

The previous prime is 2002501381. The next prime is 2002501433. The reversal of 2002501421 is 1241052002.

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 a de Polignac number, because none of the positive numbers 2^k-2002501421 is a prime.

It is a super-2 number, since 2×2002501421² = 8020023882214038482, which contains 22 as substring.

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 2002501421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002501441) 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, 4489691 + ... + 4490136.

It is an arithmetic number, because the mean of its divisors is an integer number (502870368).

Almost surely, 2^2002501421 is an apocalyptic number.

It is an amenable number.

2002501421 is a deficient number, since it is larger than the sum of its proper divisors (8980051).

2002501421 is an equidigital number, since it uses as much as digits as its factorization.

2002501421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980050.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 2002501421 is about 44749.3175478688. The cubic root of 2002501421 is about 1260.4460965573.

Adding to 2002501421 its reverse (1241052002), we get a palindrome (3243553423).

The spelling of 2002501421 in words is "two billion, two million, five hundred one thousand, four hundred twenty-one".