1420819 has 2 divisors, whose sum is σ = 1420820. Its totient is φ = 1420818.

The previous prime is 1420817. The next prime is 1420831. The reversal of 1420819 is 9180241.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1420819 - 2¹ = 1420817 is a prime.

It is a super-2 number, since 2×1420819² = 4037453261522, which contains 22 as substring.

Together with 1420817, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1420793 and 1420802.

It is not a weakly prime, because it can be changed into another prime (1420817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710409 + 710410.

It is an arithmetic number, because the mean of its divisors is an integer number (710410).

2^1420819 is an apocalyptic number.

1420819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420819 is an equidigital number, since it uses as much as digits as its factorization.

1420819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1420819 is about 1191.9811240116. The cubic root of 1420819 is about 112.4206914285.

It can be divided in two parts, 14 and 20819, that multiplied together give a triangular number (291466 = T₇₆₃).

The spelling of 1420819 in words is "one million, four hundred twenty thousand, eight hundred nineteen".