1325551 has 4 divisors (see below), whose sum is σ = 1334152. Its totient is φ = 1316952.

The previous prime is 1325543. The next prime is 1325557. The reversal of 1325551 is 1555231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1325551 - 2³ = 1325543 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 (1325557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4065 + ... + 4378.

It is an arithmetic number, because the mean of its divisors is an integer number (333538).

2^1325551 is an apocalyptic number.

1325551 is a deficient number, since it is larger than the sum of its proper divisors (8601).

1325551 is an equidigital number, since it uses as much as digits as its factorization.

1325551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8600.

The product of its digits is 750, while the sum is 22.

The square root of 1325551 is about 1151.3257575508. The cubic root of 1325551 is about 109.8496844939.

Subtracting from 1325551 its product of digits (750), we obtain a square (1324801 = 1151²).

The spelling of 1325551 in words is "one million, three hundred twenty-five thousand, five hundred fifty-one".