1266625 has 8 divisors (see below), whose sum is σ = 1580904. Its totient is φ = 1013200.

The previous prime is 1266611. The next prime is 1266631. The reversal of 1266625 is 5266621.

It can be written as a sum of positive squares in 4 ways, for example, as 3249 + 1263376 = 57^2 + 1124^2 .

It is not a de Polignac number, because 1266625 - 2⁵ = 1266593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1266593 and 1266602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4942 + ... + 5191.

It is an arithmetic number, because the mean of its divisors is an integer number (197613).

2^1266625 is an apocalyptic number.

It is an amenable number.

1266625 is a deficient number, since it is larger than the sum of its proper divisors (314279).

1266625 is an equidigital number, since it uses as much as digits as its factorization.

1266625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148 (or 10138 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 1266625 is about 1125.4443566876. Note that the first 3 decimals coincide. The cubic root of 1266625 is about 108.1971991535.

It can be divided in two parts, 1266 and 625, that added together give a triangular number (1891 = T₆₁).

The spelling of 1266625 in words is "one million, two hundred sixty-six thousand, six hundred twenty-five".