1531625 has 8 divisors (see below), whose sum is σ = 1911624. Its totient is φ = 1225200.

The previous prime is 1531619. The next prime is 1531627. The reversal of 1531625 is 5261351.

It can be written as a sum of positive squares in 4 ways, for example, as 72361 + 1459264 = 269^2 + 1208^2 .

It is not a de Polignac number, because 1531625 - 2⁶ = 1531561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1531625.

It is not an unprimeable number, because it can be changed into a prime (1531627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6002 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (238953).

2^1531625 is an apocalyptic number.

It is an amenable number.

1531625 is a deficient number, since it is larger than the sum of its proper divisors (379999).

1531625 is an equidigital number, since it uses as much as digits as its factorization.

1531625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12268 (or 12258 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 1531625 is about 1237.5883806824. The cubic root of 1531625 is about 115.2703155871.

Adding to 1531625 its reverse (5261351), we get a palindrome (6792976).

The spelling of 1531625 in words is "one million, five hundred thirty-one thousand, six hundred twenty-five".