1209712 has 30 divisors (see below), whose sum is σ = 2728248. Its totient is φ = 518112.

The previous prime is 1209709. The next prime is 1209739. The reversal of 1209712 is 2179021.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13 + ... + 1555.

2^1209712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364124).

1209712 is an abundant number, since it is smaller than the sum of its proper divisors (1518536).

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

1209712 is a wasteful number, since it uses less digits than its factorization.

1209712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1209712 is about 1099.8690831185. The cubic root of 1209712 is about 106.5517686410.

The spelling of 1209712 in words is "one million, two hundred nine thousand, seven hundred twelve".