7142256061521 has 16 divisors (see below), whose sum is σ = 10884040979328. Its totient is φ = 4081062988800.

The previous prime is 7142256061519. The next prime is 7142256061639. The reversal of 7142256061521 is 1251606522417.

It is not a de Polignac number, because 7142256061521 - 2¹ = 7142256061519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7142256061121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9036240 + ... + 9794801.

It is an arithmetic number, because the mean of its divisors is an integer number (680252561208).

Almost surely, 2^{7142256061521} is an apocalyptic number.

It is an amenable number.

7142256061521 is a deficient number, since it is larger than the sum of its proper divisors (3741784917807).

7142256061521 is a wasteful number, since it uses less digits than its factorization.

7142256061521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18849112.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 7142256061521 in words is "seven trillion, one hundred forty-two billion, two hundred fifty-six million, sixty-one thousand, five hundred twenty-one".