1300012421 has 4 divisors (see below), whose sum is σ = 1330245312. Its totient is φ = 1269779532.

The previous prime is 1300012403. The next prime is 1300012447. The reversal of 1300012421 is 1242100031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1242100031 = 31547 ⋅39373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1300012421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1300012396 and 1300012405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300012451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15116381 + ... + 15116466.

It is an arithmetic number, because the mean of its divisors is an integer number (332561328).

Almost surely, 2^1300012421 is an apocalyptic number.

It is an amenable number.

1300012421 is a deficient number, since it is larger than the sum of its proper divisors (30232891).

1300012421 is an equidigital number, since it uses as much as digits as its factorization.

1300012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30232890.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1300012421 is about 36055.6850025069. The cubic root of 1300012421 is about 1091.3963589964.

Adding to 1300012421 its reverse (1242100031), we get a palindrome (2542112452).

The spelling of 1300012421 in words is "one billion, three hundred million, twelve thousand, four hundred twenty-one".