1313030421 has 6 divisors (see below), whose sum is σ = 1896599510. Its totient is φ = 875353608.

The previous prime is 1313030351. The next prime is 1313030437. The reversal of 1313030421 is 1240303131.

It can be written as a sum of positive squares in only one way, i.e., 1081686321 + 231344100 = 32889^2 + 15210^2 .

It is not a de Polignac number, because 1313030421 - 2¹⁹ = 1312506133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313030394 and 1313030403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313030441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72946126 + ... + 72946143.

Almost surely, 2^1313030421 is an apocalyptic number.

It is an amenable number.

1313030421 is a deficient number, since it is larger than the sum of its proper divisors (583569089).

1313030421 is a wasteful number, since it uses less digits than its factorization.

1313030421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145892275 (or 145892272 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1313030421 is about 36235.7616312946. The cubic root of 1313030421 is about 1095.0272564680.

Adding to 1313030421 its reverse (1240303131), we get a palindrome (2553333552).

The spelling of 1313030421 in words is "one billion, three hundred thirteen million, thirty thousand, four hundred twenty-one".