1842112421 has 2 divisors, whose sum is σ = 1842112422. Its totient is φ = 1842112420.

The previous prime is 1842112417. The next prime is 1842112423. The reversal of 1842112421 is 1242112481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1150159396 + 691953025 = 33914^2 + 26305^2 .

It is an emirp because it is prime and its reverse (1242112481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1842112421 - 2² = 1842112417 is a prime.

Together with 1842112423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1842112423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921056210 + 921056211.

It is an arithmetic number, because the mean of its divisors is an integer number (921056211).

Almost surely, 2^1842112421 is an apocalyptic number.

It is an amenable number.

1842112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1842112421 is an equidigital number, since it uses as much as digits as its factorization.

1842112421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 26.

The square root of 1842112421 is about 42919.8371502036. The cubic root of 1842112421 is about 1225.8538921711.

The spelling of 1842112421 in words is "one billion, eight hundred forty-two million, one hundred twelve thousand, four hundred twenty-one".