6521260420 has 24 divisors (see below), whose sum is σ = 13699224000. Its totient is φ = 2607632352.

The previous prime is 6521260411. The next prime is 6521260429. The reversal of 6521260420 is 240621256.

It is an interprime number because it is at equal distance from previous prime (6521260411) and next prime (6521260429).

It is not an unprimeable number, because it can be changed into a prime (6521260429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8631 + ... + 114529.

It is an arithmetic number, because the mean of its divisors is an integer number (570801000).

Almost surely, 2^6521260420 is an apocalyptic number.

It is an amenable number.

6521260420 is an abundant number, since it is smaller than the sum of its proper divisors (7177963580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6521260420 is a wasteful number, since it uses less digits than its factorization.

6521260420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108987 (or 108985 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6521260420 is about 80754.3213704381. The cubic root of 6521260420 is about 1868.2881013056.

Adding to 6521260420 its reverse (240621256), we get a palindrome (6761881676).

The spelling of 6521260420 in words is "six billion, five hundred twenty-one million, two hundred sixty thousand, four hundred twenty".