1420851 has 4 divisors (see below), whose sum is σ = 1894472. Its totient is φ = 947232.

The previous prime is 1420847. The next prime is 1420879. The reversal of 1420851 is 1580241.

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

It is not a de Polignac number, because 1420851 - 2² = 1420847 is a prime.

It is a D-number.

It is a Duffinian number.

1420851 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1420831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236806 + ... + 236811.

It is an arithmetic number, because the mean of its divisors is an integer number (473618).

2^1420851 is an apocalyptic number.

1420851 is a deficient number, since it is larger than the sum of its proper divisors (473621).

1420851 is an equidigital number, since it uses as much as digits as its factorization.

1420851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473620.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1420851 is about 1191.9945469674. The cubic root of 1420851 is about 112.4215354100.

The spelling of 1420851 in words is "one million, four hundred twenty thousand, eight hundred fifty-one".