1395631 has 4 divisors (see below), whose sum is σ = 1401664. Its totient is φ = 1389600.

The previous prime is 1395629. The next prime is 1395643. The reversal of 1395631 is 1365931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1395631 - 2¹ = 1395629 is a prime.

It is a super-2 number, since 2×1395631² = 3895571776322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1395631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395661) 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 3 ways as a sum of consecutive naturals, for example, 2655 + ... + 3136.

It is an arithmetic number, because the mean of its divisors is an integer number (350416).

2^1395631 is an apocalyptic number.

1395631 is a deficient number, since it is larger than the sum of its proper divisors (6033).

1395631 is an equidigital number, since it uses as much as digits as its factorization.

1395631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6032.

The product of its digits is 2430, while the sum is 28.

The square root of 1395631 is about 1181.3682745021. The cubic root of 1395631 is about 111.7524026596.

The spelling of 1395631 in words is "one million, three hundred ninety-five thousand, six hundred thirty-one".