1263625 has 16 divisors (see below), whose sum is σ = 1722240. Its totient is φ = 918000.

The previous prime is 1263607. The next prime is 1263629. The reversal of 1263625 is 5263621.

It is not a de Polignac number, because 1263625 - 2⁹ = 1263113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1263625.

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 in 15 ways as a sum of consecutive naturals, for example, 916 + ... + 1834.

It is an arithmetic number, because the mean of its divisors is an integer number (107640).

2^1263625 is an apocalyptic number.

It is an amenable number.

1263625 is a deficient number, since it is larger than the sum of its proper divisors (458615).

1263625 is an equidigital number, since it uses as much as digits as its factorization.

1263625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 935 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 1263625 is about 1124.1107596674. The cubic root of 1263625 is about 108.1117099729. Note that the first 3 decimals are identical.

The spelling of 1263625 in words is "one million, two hundred sixty-three thousand, six hundred twenty-five".