1288533401 has 2 divisors, whose sum is σ = 1288533402. Its totient is φ = 1288533400.

The previous prime is 1288533359. The next prime is 1288533409. The reversal of 1288533401 is 1043358821.

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., 1264513600 + 24019801 = 35560^2 + 4901^2 .

It is a cyclic number.

It is not a de Polignac number, because 1288533401 - 2²² = 1284339097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1288533409) 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, 644266700 + 644266701.

It is an arithmetic number, because the mean of its divisors is an integer number (644266701).

Almost surely, 2^1288533401 is an apocalyptic number.

It is an amenable number.

1288533401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288533401 is an equidigital number, since it uses as much as digits as its factorization.

1288533401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1288533401 is about 35896.1474395234. The cubic root of 1288533401 is about 1088.1745393036.

The spelling of 1288533401 in words is "one billion, two hundred eighty-eight million, five hundred thirty-three thousand, four hundred one".