1405721419 has 2 divisors, whose sum is σ = 1405721420. Its totient is φ = 1405721418.

The previous prime is 1405721417. The next prime is 1405721459. The reversal of 1405721419 is 9141275041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1405721419 - 2¹ = 1405721417 is a prime.

It is a super-3 number, since 3×1405721419³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 1405721417, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1405721417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702860709 + 702860710.

It is an arithmetic number, because the mean of its divisors is an integer number (702860710).

Almost surely, 2^1405721419 is an apocalyptic number.

1405721419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405721419 is an equidigital number, since it uses as much as digits as its factorization.

1405721419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1405721419 is about 37492.9515909324. The cubic root of 1405721419 is about 1120.2107965796.

The spelling of 1405721419 in words is "one billion, four hundred five million, seven hundred twenty-one thousand, four hundred nineteen".