1320356461 has 4 divisors (see below), whose sum is σ = 1320434524. Its totient is φ = 1320278400.

The previous prime is 1320356437. The next prime is 1320356473. The reversal of 1320356461 is 1646530231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1646530231 = 107 ⋅15388133.

It can be written as a sum of positive squares in 2 ways, for example, as 597069225 + 723287236 = 24435^2 + 26894^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320356461 - 2¹³ = 1320348269 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 (1320356431) 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, 1860 + ... + 51421.

It is an arithmetic number, because the mean of its divisors is an integer number (330108631).

Almost surely, 2^1320356461 is an apocalyptic number.

It is an amenable number.

1320356461 is a deficient number, since it is larger than the sum of its proper divisors (78063).

1320356461 is an equidigital number, since it uses as much as digits as its factorization.

1320356461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78062.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1320356461 is about 36336.7095510862. The cubic root of 1320356461 is about 1097.0600450150.

Adding to 1320356461 its reverse (1646530231), we get a palindrome (2966886692).

The spelling of 1320356461 in words is "one billion, three hundred twenty million, three hundred fifty-six thousand, four hundred sixty-one".