1520425 has 12 divisors (see below), whose sum is σ = 1918156. Its totient is φ = 1195200.

The previous prime is 1520423. The next prime is 1520443. The reversal of 1520425 is 5240251.

It can be written as a sum of positive squares in 6 ways, for example, as 87616 + 1432809 = 296^2 + 1197^2 .

It is not a de Polignac number, because 1520425 - 2¹ = 1520423 is a prime.

It is a Duffinian number.

1520425 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1520423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1027 + ... + 2023.

2^1520425 is an apocalyptic number.

It is an amenable number.

1520425 is a deficient number, since it is larger than the sum of its proper divisors (397731).

1520425 is an equidigital number, since it uses as much as digits as its factorization.

1520425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1520425 is about 1233.0551488072. The cubic root of 1520425 is about 114.9886567262.

Adding to 1520425 its reverse (5240251), we get a palindrome (6760676).

The spelling of 1520425 in words is "one million, five hundred twenty thousand, four hundred twenty-five".