1395720 has 48 divisors (see below), whose sum is σ = 4537260. Its totient is φ = 372096.

The previous prime is 1395697. The next prime is 1395739. The reversal of 1395720 is 275931.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 54756 = 1158^2 + 234^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1579 + ... + 2298.

2^1395720 is an apocalyptic number.

1395720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1395720 is an abundant number, since it is smaller than the sum of its proper divisors (3141540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1395720 is a wasteful number, since it uses less digits than its factorization.

1395720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 1395720 is about 1181.4059420876. The cubic root of 1395720 is about 111.7547781090.

The spelling of 1395720 in words is "one million, three hundred ninety-five thousand, seven hundred twenty".