1325532021 has 16 divisors (see below), whose sum is σ = 2011875840. Its totient is φ = 768423920.

The previous prime is 1325532011. The next prime is 1325532077. The reversal of 1325532021 is 1202355231.

It is a happy number.

It is not a de Polignac number, because 1325532021 - 2⁵ = 1325531989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1325531982 and 1325532000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325532011) 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 15 ways as a sum of consecutive naturals, for example, 872451 + ... + 873968.

It is an arithmetic number, because the mean of its divisors is an integer number (125742240).

Almost surely, 2^1325532021 is an apocalyptic number.

1325532021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1325532021 is a deficient number, since it is larger than the sum of its proper divisors (686343819).

1325532021 is a wasteful number, since it uses less digits than its factorization.

1325532021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746456.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1325532021 is about 36407.8565834354. The cubic root of 1325532021 is about 1098.4916022207.

Adding to 1325532021 its reverse (1202355231), we get a palindrome (2527887252).

The spelling of 1325532021 in words is "one billion, three hundred twenty-five million, five hundred thirty-two thousand, twenty-one".