1420845 has 8 divisors (see below), whose sum is σ = 2273376. Its totient is φ = 757776.

The previous prime is 1420841. The next prime is 1420847. The reversal of 1420845 is 5480241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1420845 - 2² = 1420841 is a prime.

It is a Curzon number.

1420845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47347 + ... + 47376.

It is an arithmetic number, because the mean of its divisors is an integer number (284172).

2^1420845 is an apocalyptic number.

1420845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1420845 is a deficient number, since it is larger than the sum of its proper divisors (852531).

1420845 is an equidigital number, since it uses as much as digits as its factorization.

1420845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94731.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1420845 is about 1191.9920301747. The cubic root of 1420845 is about 112.4213771645.

The spelling of 1420845 in words is "one million, four hundred twenty thousand, eight hundred forty-five".