1322520421 has 2 divisors, whose sum is σ = 1322520422. Its totient is φ = 1322520420.

The previous prime is 1322520383. The next prime is 1322520439. The reversal of 1322520421 is 1240252231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050732225 + 271788196 = 32415^2 + 16486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322520421 - 2⁷ = 1322520293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1322520392 and 1322520401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322529421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661260210 + 661260211.

It is an arithmetic number, because the mean of its divisors is an integer number (661260211).

Almost surely, 2^1322520421 is an apocalyptic number.

It is an amenable number.

1322520421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322520421 is an equidigital number, since it uses as much as digits as its factorization.

1322520421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1322520421 is about 36366.4738598616. The cubic root of 1322520421 is about 1097.6590494947.

Adding to 1322520421 its reverse (1240252231), we get a palindrome (2562772652).

The spelling of 1322520421 in words is "one billion, three hundred twenty-two million, five hundred twenty thousand, four hundred twenty-one".