1321032451 has 2 divisors, whose sum is σ = 1321032452. Its totient is φ = 1321032450.

The previous prime is 1321032403. The next prime is 1321032467. The reversal of 1321032451 is 1542301231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321032451 - 2²⁷ = 1186814723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321032151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660516225 + 660516226.

It is an arithmetic number, because the mean of its divisors is an integer number (660516226).

Almost surely, 2^1321032451 is an apocalyptic number.

1321032451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321032451 is an equidigital number, since it uses as much as digits as its factorization.

1321032451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1321032451 is about 36346.0101111525. The cubic root of 1321032451 is about 1097.2472356505.

Adding to 1321032451 its reverse (1542301231), we get a palindrome (2863333682).

The spelling of 1321032451 in words is "one billion, three hundred twenty-one million, thirty-two thousand, four hundred fifty-one".