1420864 has 21 divisors (see below), whose sum is σ = 2838577. Its totient is φ = 705664.

The previous prime is 1420847. The next prime is 1420879. The reversal of 1420864 is 4680241.

The square root of 1420864 is 1192.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 166464 + 1254400 = 408^2 + 1120^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9462 + ... + 9610.

2^1420864 is an apocalyptic number.

1420864 is the 1192-nd square number.

It is an amenable number.

1420864 is a deficient number, since it is larger than the sum of its proper divisors (1417713).

1420864 is an frugal number, since it uses more digits than its factorization.

1420864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The cubic root of 1420864 is about 112.4218782739.

Multiplying 1420864 by its sum of digits (25), we get a square (35521600 = 5960²).

The spelling of 1420864 in words is "one million, four hundred twenty thousand, eight hundred sixty-four".