1420905 has 8 divisors (see below), whose sum is σ = 2273472. Its totient is φ = 757808.

The previous prime is 1420901. The next prime is 1420919. The reversal of 1420905 is 5090241.

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

It is a cyclic number.

It is not a de Polignac number, because 1420905 - 2² = 1420901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1420901) 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, 47349 + ... + 47378.

It is an arithmetic number, because the mean of its divisors is an integer number (284184).

2^1420905 is an apocalyptic number.

1420905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1420905 is a deficient number, since it is larger than the sum of its proper divisors (852567).

1420905 is an equidigital number, since it uses as much as digits as its factorization.

1420905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94735.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1420905 is about 1192.0171978625. The cubic root of 1420905 is about 112.4229596002.

The spelling of 1420905 in words is "one million, four hundred twenty thousand, nine hundred five".