1234579421 has 2 divisors, whose sum is σ = 1234579422. Its totient is φ = 1234579420.

The previous prime is 1234579417. The next prime is 1234579429. The reversal of 1234579421 is 1249754321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210274521 + 24304900 = 34789^2 + 4930^2 .

It is an emirp because it is prime and its reverse (1249754321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1234579421 - 2² = 1234579417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234579429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617289710 + 617289711.

It is an arithmetic number, because the mean of its divisors is an integer number (617289711).

Almost surely, 2^1234579421 is an apocalyptic number.

It is an amenable number.

1234579421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234579421 is an equidigital number, since it uses as much as digits as its factorization.

1234579421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 1234579421 is about 35136.5823750689. The cubic root of 1234579421 is about 1072.7693195481.

The spelling of 1234579421 in words is "one billion, two hundred thirty-four million, five hundred seventy-nine thousand, four hundred twenty-one".