1331625 has 32 divisors (see below), whose sum is σ = 2291328. Its totient is φ = 686400.

The previous prime is 1331611. The next prime is 1331633. The reversal of 1331625 is 5261331.

It is not a de Polignac number, because 1331625 - 2⁷ = 1331497 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19842 + ... + 19908.

It is an arithmetic number, because the mean of its divisors is an integer number (71604).

2^1331625 is an apocalyptic number.

1331625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331625 is a deficient number, since it is larger than the sum of its proper divisors (959703).

1331625 is an equidigital number, since it uses as much as digits as its factorization.

1331625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 128 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 1331625 is about 1153.9605712502. The cubic root of 1331625 is about 110.0172149366.

Adding to 1331625 its reverse (5261331), we get a palindrome (6592956).

The spelling of 1331625 in words is "one million, three hundred thirty-one thousand, six hundred twenty-five".