1321724770 has 8 divisors (see below), whose sum is σ = 2379104604. Its totient is φ = 528689904.

The previous prime is 1321724713. The next prime is 1321724771. The reversal of 1321724770 is 774271231.

It can be written as a sum of positive squares in 2 ways, for example, as 1210274521 + 111450249 = 34789^2 + 10557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1321724771) 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, 66086229 + ... + 66086248.

Almost surely, 2^1321724770 is an apocalyptic number.

1321724770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321724770 is a deficient number, since it is larger than the sum of its proper divisors (1057379834).

1321724770 is a wasteful number, since it uses less digits than its factorization.

1321724770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132172484.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 1321724770 is about 36355.5328664015. The cubic root of 1321724770 is about 1097.4388818243.

The spelling of 1321724770 in words is "one billion, three hundred twenty-one million, seven hundred twenty-four thousand, seven hundred seventy".