1012421243 has 2 divisors, whose sum is σ = 1012421244. Its totient is φ = 1012421242.

The previous prime is 1012421239. The next prime is 1012421279. The reversal of 1012421243 is 3421242101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012421243 - 2² = 1012421239 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1012421203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506210621 + 506210622.

It is an arithmetic number, because the mean of its divisors is an integer number (506210622).

Almost surely, 2^1012421243 is an apocalyptic number.

1012421243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012421243 is an equidigital number, since it uses as much as digits as its factorization.

1012421243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1012421243 is about 31818.5675824667. The cubic root of 1012421243 is about 1004.1233886305.

Adding to 1012421243 its reverse (3421242101), we get a palindrome (4433663344).

The spelling of 1012421243 in words is "one billion, twelve million, four hundred twenty-one thousand, two hundred forty-three".