1261625 has 8 divisors (see below), whose sum is σ = 1574664. Its totient is φ = 1009200.

The previous prime is 1261571. The next prime is 1261627. The reversal of 1261625 is 5261621.

It can be written as a sum of positive squares in 4 ways, for example, as 53824 + 1207801 = 232^2 + 1099^2 .

It is not a de Polignac number, because 1261625 - 2¹⁶ = 1196089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1261625.

It is not an unprimeable number, because it can be changed into a prime (1261627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4922 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (196833).

2^1261625 is an apocalyptic number.

It is an amenable number.

1261625 is a deficient number, since it is larger than the sum of its proper divisors (313039).

1261625 is an equidigital number, since it uses as much as digits as its factorization.

1261625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10108 (or 10098 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 1261625 is about 1123.2208153342. The cubic root of 1261625 is about 108.0546419883.

The spelling of 1261625 in words is "one million, two hundred sixty-one thousand, six hundred twenty-five".