1420109 has 2 divisors, whose sum is σ = 1420110. Its totient is φ = 1420108.

The previous prime is 1420099. The next prime is 1420121. The reversal of 1420109 is 9010241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 850084 + 570025 = 922^2 + 755^2 .

It is an emirp because it is prime and its reverse (9010241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1420109 - 2⁴ = 1420093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710054 + 710055.

It is an arithmetic number, because the mean of its divisors is an integer number (710055).

2^1420109 is an apocalyptic number.

It is an amenable number.

1420109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420109 is an equidigital number, since it uses as much as digits as its factorization.

1420109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1420109 is about 1191.6832632877. The cubic root of 1420109 is about 112.4019623269.

The spelling of 1420109 in words is "one million, four hundred twenty thousand, one hundred nine".