1156587850421 has 6 divisors (see below), whose sum is σ = 1220664740022. Its totient is φ = 1095714805320.

The previous prime is 1156587850399. The next prime is 1156587850433. The reversal of 1156587850421 is 1240587856511.

It can be written as a sum of positive squares in only one way, i.e., 1105208561521 + 51379288900 = 1051289^2 + 226670^2 .

It is not a de Polignac number, because 1156587850421 - 2¹⁰ = 1156587849397 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 (1156587850921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1601921870 + ... + 1601922591.

It is an arithmetic number, because the mean of its divisors is an integer number (203444123337).

Almost surely, 2^{1156587850421} is an apocalyptic number.

It is an amenable number.

1156587850421 is a deficient number, since it is larger than the sum of its proper divisors (64076889601).

1156587850421 is an equidigital number, since it uses as much as digits as its factorization.

1156587850421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203844499 (or 3203844480 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 53.

The spelling of 1156587850421 in words is "one trillion, one hundred fifty-six billion, five hundred eighty-seven million, eight hundred fifty thousand, four hundred twenty-one".