1520525 has 6 divisors (see below), whose sum is σ = 1885482. Its totient is φ = 1216400.

The previous prime is 1520509. The next prime is 1520527. The reversal of 1520525 is 5250251.

It can be written as a sum of positive squares in 3 ways, for example, as 111556 + 1408969 = 334^2 + 1187^2 .

It is not a de Polignac number, because 1520525 - 2⁴ = 1520509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1520497 and 1520506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520527) 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, 30386 + ... + 30435.

It is an arithmetic number, because the mean of its divisors is an integer number (314247).

2^1520525 is an apocalyptic number.

It is an amenable number.

1520525 is a deficient number, since it is larger than the sum of its proper divisors (364957).

1520525 is an equidigital number, since it uses as much as digits as its factorization.

1520525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60831 (or 60826 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 1520525 is about 1233.0956978272. The cubic root of 1520525 is about 114.9911776471.

Adding to 1520525 its reverse (5250251), we get a palindrome (6770776).

The spelling of 1520525 in words is "one million, five hundred twenty thousand, five hundred twenty-five".