1315666 has 16 divisors (see below), whose sum is σ = 2183040. Its totient is φ = 589680.

The previous prime is 1315661. The next prime is 1315673. The reversal of 1315666 is 6665131.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1315661) 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, 1360 + ... + 2116.

It is an arithmetic number, because the mean of its divisors is an integer number (136440).

2^1315666 is an apocalyptic number.

1315666 is a deficient number, since it is larger than the sum of its proper divisors (867374).

1315666 is a wasteful number, since it uses less digits than its factorization.

1315666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849.

The product of its digits is 3240, while the sum is 28.

The square root of 1315666 is about 1147.0248471589. The cubic root of 1315666 is about 109.5759430923.

It can be divided in two parts, 131566 and 6, that multiplied together give a triangular number (789396 = T₁₂₅₆).

The spelling of 1315666 in words is "one million, three hundred fifteen thousand, six hundred sixty-six".