1560021025261 has 4 divisors (see below), whose sum is σ = 1596300584032. Its totient is φ = 1523741466492.

The previous prime is 1560021025223. The next prime is 1560021025279. The reversal of 1560021025261 is 1625201200651.

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 not a de Polignac number, because 1560021025261 - 2¹⁵ = 1560020992493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1560021025201) 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, 18139779321 + ... + 18139779406.

It is an arithmetic number, because the mean of its divisors is an integer number (399075146008).

Almost surely, 2^{1560021025261} is an apocalyptic number.

It is an amenable number.

1560021025261 is a deficient number, since it is larger than the sum of its proper divisors (36279558771).

1560021025261 is an equidigital number, since it uses as much as digits as its factorization.

1560021025261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36279558770.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 1560021025261 in words is "one trillion, five hundred sixty billion, twenty-one million, twenty-five thousand, two hundred sixty-one".