1420129 has 4 divisors (see below), whose sum is σ = 1503684. Its totient is φ = 1336576.

The previous prime is 1420123. The next prime is 1420151. The reversal of 1420129 is 9210241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1327104 + 93025 = 1152^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420129 - 2³ = 1420121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1420121) 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 in 3 ways as a sum of consecutive naturals, for example, 41752 + ... + 41785.

It is an arithmetic number, because the mean of its divisors is an integer number (375921).

2^1420129 is an apocalyptic number.

It is an amenable number.

1420129 is a deficient number, since it is larger than the sum of its proper divisors (83555).

1420129 is an equidigital number, since it uses as much as digits as its factorization.

1420129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83554.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1420129 is about 1191.6916547497. The cubic root of 1420129 is about 112.4024899927.

The spelling of 1420129 in words is "one million, four hundred twenty thousand, one hundred twenty-nine".