1261825 has 12 divisors (see below), whose sum is σ = 1657260. Its totient is φ = 949760.

The previous prime is 1261823. The next prime is 1261829. The reversal of 1261825 is 5281621.

It can be written as a sum of positive squares in 6 ways, for example, as 146689 + 1115136 = 383^2 + 1056^2 .

It is not a de Polignac number, because 1261825 - 2¹ = 1261823 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1261825.

It is not an unprimeable number, because it can be changed into a prime (1261823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1060 + ... + 1909.

It is an arithmetic number, because the mean of its divisors is an integer number (138105).

2^1261825 is an apocalyptic number.

It is an amenable number.

1261825 is a deficient number, since it is larger than the sum of its proper divisors (395435).

1261825 is a wasteful number, since it uses less digits than its factorization.

1261825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2991 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 1261825 is about 1123.3098414952. The cubic root of 1261825 is about 108.0603514996.

The spelling of 1261825 in words is "one million, two hundred sixty-one thousand, eight hundred twenty-five".