1420287 has 16 divisors (see below), whose sum is σ = 2085888. Its totient is φ = 852480.

The previous prime is 1420283. The next prime is 1420291. The reversal of 1420287 is 7820241.

It is an interprime number because it is at equal distance from previous prime (1420283) and next prime (1420291).

It is not a de Polignac number, because 1420287 - 2² = 1420283 is a prime.

1420287 is a lucky number.

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6258 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (130368).

2^1420287 is an apocalyptic number.

1420287 is a deficient number, since it is larger than the sum of its proper divisors (665601).

1420287 is a wasteful number, since it uses less digits than its factorization.

1420287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 1420287 is about 1191.7579452221. The cubic root of 1420287 is about 112.4066583780.

It can be divided in two parts, 14 and 20287, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 1420287 in words is "one million, four hundred twenty thousand, two hundred eighty-seven".