1321152045 has 32 divisors (see below), whose sum is σ = 2148768000. Its totient is φ = 693057024.

The previous prime is 1321152011. The next prime is 1321152071. The reversal of 1321152045 is 5402511231.

It is a happy number.

It is not a de Polignac number, because 1321152045 - 2⁶ = 1321151981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263179 + ... + 268151.

It is an arithmetic number, because the mean of its divisors is an integer number (67149000).

Almost surely, 2^1321152045 is an apocalyptic number.

1321152045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321152045 is a deficient number, since it is larger than the sum of its proper divisors (827615955).

1321152045 is a wasteful number, since it uses less digits than its factorization.

1321152045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1321152045 is about 36347.6552888904. The cubic root of 1321152045 is about 1097.2803461736.

Adding to 1321152045 its reverse (5402511231), we get a palindrome (6723663276).

It can be divided in two parts, 13211 and 52045, that added together give a palindrome (65256).

The spelling of 1321152045 in words is "one billion, three hundred twenty-one million, one hundred fifty-two thousand, forty-five".