1231716 has 12 divisors (see below), whose sum is σ = 2874032. Its totient is φ = 410568.

The previous prime is 1231709. The next prime is 1231721. The reversal of 1231716 is 6171321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a nialpdrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1231692 and 1231701.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51310 + ... + 51333.

2^1231716 is an apocalyptic number.

It is an amenable number.

1231716 is an abundant number, since it is smaller than the sum of its proper divisors (1642316).

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

1231716 is a wasteful number, since it uses less digits than its factorization.

1231716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102650 (or 102648 counting only the distinct ones).

The product of its digits is 252, while the sum is 21.

The square root of 1231716 is about 1109.8270135476. The cubic root of 1231716 is about 107.1939301902.

The spelling of 1231716 in words is "one million, two hundred thirty-one thousand, seven hundred sixteen".