1261928 has 16 divisors (see below), whose sum is σ = 2379780. Its totient is φ = 627328.

The previous prime is 1261913. The next prime is 1261933. The reversal of 1261928 is 8291621.

It can be written as a sum of positive squares in 2 ways, for example, as 1214404 + 47524 = 1102^2 + 218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1261928.

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, 1526 + ... + 2202.

2^1261928 is an apocalyptic number.

It is an amenable number.

1261928 is a deficient number, since it is larger than the sum of its proper divisors (1117852).

1261928 is a wasteful number, since it uses less digits than its factorization.

1261928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 912 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 1261928 is about 1123.3556872158. The cubic root of 1261928 is about 108.0632916626.

The spelling of 1261928 in words is "one million, two hundred sixty-one thousand, nine hundred twenty-eight".