1281525 has 24 divisors (see below), whose sum is σ = 2422464. Its totient is φ = 585600.

The previous prime is 1281523. The next prime is 1281541. The reversal of 1281525 is 5251821.

It is not a de Polignac number, because 1281525 - 2¹ = 1281523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1281495 and 1281504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 696 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (100936).

2^1281525 is an apocalyptic number.

1281525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1281525 is a deficient number, since it is larger than the sum of its proper divisors (1140939).

1281525 is a wasteful number, since it uses less digits than its factorization.

1281525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461 (or 2456 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 1281525 is about 1132.0446104284. The cubic root of 1281525 is about 108.6198072056.

It can be divided in two parts, 128 and 1525, that added together give a triangular number (1653 = T₅₇).

The spelling of 1281525 in words is "one million, two hundred eighty-one thousand, five hundred twenty-five".