1420945 has 16 divisors (see below), whose sum is σ = 1838160. Its totient is φ = 1050624.

The previous prime is 1420933. The next prime is 1420949. The reversal of 1420945 is 5490241.

1420945 = T₆₀ + T₆₁ + ... + T₂₀₅.

It can be written as a sum of positive squares in 8 ways, for example, as 186624 + 1234321 = 432^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420945 - 2⁷ = 1420817 is a prime.

1420945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1420949) 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 15 ways as a sum of consecutive naturals, for example, 6091 + ... + 6319.

It is an arithmetic number, because the mean of its divisors is an integer number (114885).

2^1420945 is an apocalyptic number.

It is an amenable number.

1420945 is a deficient number, since it is larger than the sum of its proper divisors (417215).

1420945 is a wasteful number, since it uses less digits than its factorization.

1420945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1420945 is about 1192.0339760259. The cubic root of 1420945 is about 112.4240145326.

The spelling of 1420945 in words is "one million, four hundred twenty thousand, nine hundred forty-five".