1194399421 has 2 divisors, whose sum is σ = 1194399422. Its totient is φ = 1194399420.

The previous prime is 1194399397. The next prime is 1194399431. The reversal of 1194399421 is 1249934911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828633796 + 365765625 = 28786^2 + 19125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1194399421 - 2⁷ = 1194399293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1194399431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597199710 + 597199711.

It is an arithmetic number, because the mean of its divisors is an integer number (597199711).

Almost surely, 2^1194399421 is an apocalyptic number.

It is an amenable number.

1194399421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194399421 is an equidigital number, since it uses as much as digits as its factorization.

1194399421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 1194399421 is about 34560.0842157539. The cubic root of 1194399421 is about 1061.0027952382.

The spelling of 1194399421 in words is "one billion, one hundred ninety-four million, three hundred ninety-nine thousand, four hundred twenty-one".