1261328 has 20 divisors (see below), whose sum is σ = 2523648. Its totient is φ = 610080.

The previous prime is 1261327. The next prime is 1261333. The reversal of 1261328 is 8231621.

1261328 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1261321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776 + ... + 1767.

2^1261328 is an apocalyptic number.

It is an amenable number.

1261328 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1261328 is a wasteful number, since it uses less digits than its factorization.

1261328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582 (or 2576 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 1261328 is about 1123.0885984641. The cubic root of 1261328 is about 108.0461622506.

Adding to 1261328 its reverse (8231621), we get a palindrome (9492949).

The spelling of 1261328 in words is "one million, two hundred sixty-one thousand, three hundred twenty-eight".