1315441021 has 4 divisors (see below), whose sum is σ = 1331289792. Its totient is φ = 1299592252.

The previous prime is 1315441019. The next prime is 1315441033. The reversal of 1315441021 is 1201445131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1315441021 - 2¹ = 1315441019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1315440983 and 1315441001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315441081) 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, 7924261 + ... + 7924426.

It is an arithmetic number, because the mean of its divisors is an integer number (332822448).

Almost surely, 2^1315441021 is an apocalyptic number.

It is an amenable number.

1315441021 is a deficient number, since it is larger than the sum of its proper divisors (15848771).

1315441021 is an equidigital number, since it uses as much as digits as its factorization.

1315441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15848770.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1315441021 is about 36269.0090986782. The cubic root of 1315441021 is about 1095.6969690431.

Adding to 1315441021 its reverse (1201445131), we get a palindrome (2516886152).

The spelling of 1315441021 in words is "one billion, three hundred fifteen million, four hundred forty-one thousand, twenty-one".