1420687 has 8 divisors (see below), whose sum is σ = 1560960. Its totient is φ = 1287000.

The previous prime is 1420667. The next prime is 1420697. The reversal of 1420687 is 7860241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420687 is a prime.

It is an Ulam number.

It is a Duffinian number.

1420687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189 + ... + 2062.

It is an arithmetic number, because the mean of its divisors is an integer number (195120).

2^1420687 is an apocalyptic number.

1420687 is a deficient number, since it is larger than the sum of its proper divisors (140273).

1420687 is a wasteful number, since it uses less digits than its factorization.

1420687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1420687 is about 1191.9257527212. The cubic root of 1420687 is about 112.4172098706.

The spelling of 1420687 in words is "one million, four hundred twenty thousand, six hundred eighty-seven".