1321126071 has 24 divisors (see below), whose sum is σ = 1806301056. Its totient is φ = 858879840.

The previous prime is 1321126063. The next prime is 1321126073. The reversal of 1321126071 is 1706211231.

It is not a de Polignac number, because 1321126071 - 2³ = 1321126063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321126073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1777726 + ... + 1778468.

It is an arithmetic number, because the mean of its divisors is an integer number (75262544).

Almost surely, 2^1321126071 is an apocalyptic number.

1321126071 is a deficient number, since it is larger than the sum of its proper divisors (485174985).

1321126071 is an equidigital number, since it uses as much as digits as its factorization.

1321126071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1321126071 is about 36347.2979876084. The cubic root of 1321126071 is about 1097.2731552408.

The spelling of 1321126071 in words is "one billion, three hundred twenty-one million, one hundred twenty-six thousand, seventy-one".