1321322501 has 8 divisors (see below), whose sum is σ = 1412901144. Its totient is φ = 1231283200.

The previous prime is 1321322473. The next prime is 1321322531. The reversal of 1321322501 is 1052231231.

It is a Cunningham number, because it is equal to 36350²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1028741476 + 292581025 = 32074^2 + 17105^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321322501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321322531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383060 + ... + 386493.

It is an arithmetic number, because the mean of its divisors is an integer number (176612643).

Almost surely, 2^1321322501 is an apocalyptic number.

It is an amenable number.

1321322501 is a deficient number, since it is larger than the sum of its proper divisors (91578643).

1321322501 is a wasteful number, since it uses less digits than its factorization.

1321322501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769671.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1321322501 is about 36350.0000137552. Note that the first 4 decimals coincide. The cubic root of 1321322501 is about 1097.3275347809.

Adding to 1321322501 its reverse (1052231231), we get a palindrome (2373553732).

The spelling of 1321322501 in words is "one billion, three hundred twenty-one million, three hundred twenty-two thousand, five hundred one".