6120251521 has 4 divisors (see below), whose sum is σ = 6121143252. Its totient is φ = 6119359792.

The previous prime is 6120251503. The next prime is 6120251537. The reversal of 6120251521 is 1251520216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2061160000 + 4059091521 = 45400^2 + 63711^2 .

It is a cyclic number.

It is not a de Polignac number, because 6120251521 - 2⁷ = 6120251393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6120251551) 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, 435490 + ... + 449323.

It is an arithmetic number, because the mean of its divisors is an integer number (1530285813).

Almost surely, 2^6120251521 is an apocalyptic number.

It is an amenable number.

6120251521 is a deficient number, since it is larger than the sum of its proper divisors (891731).

6120251521 is an equidigital number, since it uses as much as digits as its factorization.

6120251521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891730.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 6120251521 is about 78232.0364109231. The cubic root of 6120251521 is about 1829.1799127365.

Adding to 6120251521 its reverse (1251520216), we get a palindrome (7371771737).

The spelling of 6120251521 in words is "six billion, one hundred twenty million, two hundred fifty-one thousand, five hundred twenty-one".