1321725 has 12 divisors (see below), whose sum is σ = 2185376. Its totient is φ = 704880.

The previous prime is 1321711. The next prime is 1321729. The reversal of 1321725 is 5271231.

It is not a de Polignac number, because 1321725 - 2⁵ = 1321693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8737 + ... + 8886.

2^1321725 is an apocalyptic number.

1321725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321725 is a deficient number, since it is larger than the sum of its proper divisors (863651).

1321725 is a wasteful number, since it uses less digits than its factorization.

1321725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17636 (or 17631 counting only the distinct ones).

The product of its digits is 420, while the sum is 21.

The square root of 1321725 is about 1149.6629940987. The cubic root of 1321725 is about 109.7438945481.

Adding to 1321725 its reverse (5271231), we get a palindrome (6592956).

The spelling of 1321725 in words is "one million, three hundred twenty-one thousand, seven hundred twenty-five".