1428721580015 has 4 divisors (see below), whose sum is σ = 1714465896024. Its totient is φ = 1142977264008.

The previous prime is 1428721579939. The next prime is 1428721580021. The reversal of 1428721580015 is 5100851278241.

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 1428721580015 - 2³⁸ = 1153843673071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142872157997 + ... + 142872158006.

It is an arithmetic number, because the mean of its divisors is an integer number (428616474006).

Almost surely, 2^{1428721580015} is an apocalyptic number.

1428721580015 is a deficient number, since it is larger than the sum of its proper divisors (285744316009).

1428721580015 is an equidigital number, since it uses as much as digits as its factorization.

1428721580015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285744316008.

The product of its (nonzero) digits is 179200, while the sum is 44.

The spelling of 1428721580015 in words is "one trillion, four hundred twenty-eight billion, seven hundred twenty-one million, five hundred eighty thousand, fifteen".