1321012797 has 16 divisors (see below), whose sum is σ = 1979311488. Its totient is φ = 777585600.

The previous prime is 1321012787. The next prime is 1321012841. The reversal of 1321012797 is 7972101231.

It is not a de Polignac number, because 1321012797 - 2⁶ = 1321012733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321012787) 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, 735454 + ... + 737247.

It is an arithmetic number, because the mean of its divisors is an integer number (123706968).

Almost surely, 2^1321012797 is an apocalyptic number.

It is an amenable number.

1321012797 is a deficient number, since it is larger than the sum of its proper divisors (658298691).

1321012797 is a wasteful number, since it uses less digits than its factorization.

1321012797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472740.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 1321012797 is about 36345.7397365909. The cubic root of 1321012797 is about 1097.2417940976.

The spelling of 1321012797 in words is "one billion, three hundred twenty-one million, twelve thousand, seven hundred ninety-seven".