1263628 has 6 divisors (see below), whose sum is σ = 2211356. Its totient is φ = 631812.

The previous prime is 1263607. The next prime is 1263629. The reversal of 1263628 is 8263621.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1263596 and 1263605.

It is not an unprimeable number, because it can be changed into a prime (1263629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157950 + ... + 157957.

2^1263628 is an apocalyptic number.

It is an amenable number.

1263628 is a deficient number, since it is larger than the sum of its proper divisors (947728).

1263628 is a wasteful number, since it uses less digits than its factorization.

1263628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315911 (or 315909 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 1263628 is about 1124.1120940547. The cubic root of 1263628 is about 108.1117955296. Note that the first 3 decimals are identical.

It can be divided in two parts, 1263 and 628, that added together give a triangular number (1891 = T₆₁).

The spelling of 1263628 in words is "one million, two hundred sixty-three thousand, six hundred twenty-eight".