1531525 has 6 divisors (see below), whose sum is σ = 1899122. Its totient is φ = 1225200.

The previous prime is 1531499. The next prime is 1531549. The reversal of 1531525 is 5251351.

It can be written as a sum of positive squares in 3 ways, for example, as 11236 + 1520289 = 106^2 + 1233^2 .

It is not a de Polignac number, because 1531525 - 2¹⁷ = 1400453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1531496 and 1531505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30606 + ... + 30655.

2^1531525 is an apocalyptic number.

It is an amenable number.

1531525 is a deficient number, since it is larger than the sum of its proper divisors (367597).

1531525 is an equidigital number, since it uses as much as digits as its factorization.

1531525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61271 (or 61266 counting only the distinct ones).

The product of its digits is 750, while the sum is 22.

The square root of 1531525 is about 1237.5479788679. The cubic root of 1531525 is about 115.2678068611.

Adding to 1531525 its reverse (5251351), we get a palindrome (6782876).

The spelling of 1531525 in words is "one million, five hundred thirty-one thousand, five hundred twenty-five".