1361728 has 14 divisors (see below), whose sum is σ = 2702306. Its totient is φ = 680832.

The previous prime is 1361713. The next prime is 1361741. The reversal of 1361728 is 8271631.

It can be written as a sum of positive squares in only one way, i.e., 831744 + 529984 = 912^2 + 728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1361696 and 1361705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575 + ... + 10702.

2^1361728 is an apocalyptic number.

It is an amenable number.

1361728 is a deficient number, since it is larger than the sum of its proper divisors (1340578).

1361728 is an equidigital number, since it uses as much as digits as its factorization.

1361728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21289 (or 21279 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1361728 is about 1166.9310176699. The cubic root of 1361728 is about 110.8400694394.

Subtracting 1361728 from its reverse (8271631), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1361728 in words is "one million, three hundred sixty-one thousand, seven hundred twenty-eight".