1321003153 has 2 divisors, whose sum is σ = 1321003154. Its totient is φ = 1321003152.

The previous prime is 1321003147. The next prime is 1321003169. The reversal of 1321003153 is 3513001231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1302271569 + 18731584 = 36087^2 + 4328^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321003153 - 2⁵ = 1321003121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321003153.

It is not a weakly prime, because it can be changed into another prime (1321003553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660501576 + 660501577.

It is an arithmetic number, because the mean of its divisors is an integer number (660501577).

Almost surely, 2^1321003153 is an apocalyptic number.

It is an amenable number.

1321003153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321003153 is an equidigital number, since it uses as much as digits as its factorization.

1321003153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1321003153 is about 36345.6070660541. The cubic root of 1321003153 is about 1097.2391239681.

Adding to 1321003153 its reverse (3513001231), we get a palindrome (4834004384).

The spelling of 1321003153 in words is "one billion, three hundred twenty-one million, three thousand, one hundred fifty-three".