1321400545 has 8 divisors (see below), whose sum is σ = 1587700224. Its totient is φ = 1055774064.

The previous prime is 1321400539. The next prime is 1321400557. The reversal of 1321400545 is 5450041231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321400545 - 2⁹ = 1321400033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163969 + ... + 171838.

It is an arithmetic number, because the mean of its divisors is an integer number (198462528).

Almost surely, 2^1321400545 is an apocalyptic number.

It is an amenable number.

1321400545 is a deficient number, since it is larger than the sum of its proper divisors (266299679).

1321400545 is an equidigital number, since it uses as much as digits as its factorization.

1321400545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336599.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1321400545 is about 36351.0735054689. The cubic root of 1321400545 is about 1097.3491389298.

Adding to 1321400545 its reverse (5450041231), we get a palindrome (6771441776).

The spelling of 1321400545 in words is "one billion, three hundred twenty-one million, four hundred thousand, five hundred forty-five".