1631065 has 16 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 1186560.

The previous prime is 1631059. The next prime is 1631101. The reversal of 1631065 is 5601361.

It is not a de Polignac number, because 1631065 - 2³ = 1631057 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2326 + ... + 2944.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

2^1631065 is an apocalyptic number.

It is an amenable number.

1631065 is a deficient number, since it is larger than the sum of its proper divisors (511655).

1631065 is a wasteful number, since it uses less digits than its factorization.

1631065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1631065 is about 1277.1315515639. The cubic root of 1631065 is about 117.7128178694.

The spelling of 1631065 in words is "one million, six hundred thirty-one thousand, sixty-five".