1261525 has 6 divisors (see below), whose sum is σ = 1564322. Its totient is φ = 1009200.

The previous prime is 1261523. The next prime is 1261531. The reversal of 1261525 is 5251621.

It can be written as a sum of positive squares in 3 ways, for example, as 208849 + 1052676 = 457^2 + 1026^2 .

It is not a de Polignac number, because 1261525 - 2¹ = 1261523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1261496 and 1261505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25206 + ... + 25255.

2^1261525 is an apocalyptic number.

It is an amenable number.

1261525 is a deficient number, since it is larger than the sum of its proper divisors (302797).

1261525 is an equidigital number, since it uses as much as digits as its factorization.

1261525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50471 (or 50466 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 1261525 is about 1123.1762996075. The cubic root of 1261525 is about 108.0517870064.

The spelling of 1261525 in words is "one million, two hundred sixty-one thousand, five hundred twenty-five".