1395649 has 8 divisors (see below), whose sum is σ = 1506600. Its totient is φ = 1287936.

The previous prime is 1395643. The next prime is 1395659. The reversal of 1395649 is 9465931.

It can be written as a sum of positive squares in 4 ways, for example, as 409600 + 986049 = 640^2 + 993^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1395649 - 2⁹ = 1395137 is a prime.

It is a super-3 number, since 3×1395649³ = 8155486646023633347, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127 + ... + 1675.

It is an arithmetic number, because the mean of its divisors is an integer number (188325).

2^1395649 is an apocalyptic number.

It is an amenable number.

1395649 is a deficient number, since it is larger than the sum of its proper divisors (110951).

1395649 is a wasteful number, since it uses less digits than its factorization.

1395649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619.

The product of its digits is 29160, while the sum is 37.

The square root of 1395649 is about 1181.3758927623. The cubic root of 1395649 is about 111.7528830957.

The spelling of 1395649 in words is "one million, three hundred ninety-five thousand, six hundred forty-nine".