1111437421 has 2 divisors, whose sum is σ = 1111437422. Its totient is φ = 1111437420.

The previous prime is 1111437419. The next prime is 1111437443. The reversal of 1111437421 is 1247341111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755700100 + 355737321 = 27490^2 + 18861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111437421 - 2¹ = 1111437419 is a prime.

Together with 1111437419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111437521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555718710 + 555718711.

It is an arithmetic number, because the mean of its divisors is an integer number (555718711).

Almost surely, 2^1111437421 is an apocalyptic number.

It is an amenable number.

1111437421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111437421 is an equidigital number, since it uses as much as digits as its factorization.

1111437421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 1111437421 is about 33338.2276223557. The cubic root of 1111437421 is about 1035.8455507967.

Adding to 1111437421 its reverse (1247341111), we get a palindrome (2358778532).

The spelling of 1111437421 in words is "one billion, one hundred eleven million, four hundred thirty-seven thousand, four hundred twenty-one".