1321250055 has 8 divisors (see below), whose sum is σ = 2114000112. Its totient is φ = 704666688.

The previous prime is 1321250027. The next prime is 1321250093. The reversal of 1321250055 is 5500521231.

It is a happy number.

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

It is not a de Polignac number, because 1321250055 - 2⁵ = 1321250023 is a prime.

It is a congruent 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, 44041654 + ... + 44041683.

It is an arithmetic number, because the mean of its divisors is an integer number (264250014).

Almost surely, 2^1321250055 is an apocalyptic number.

1321250055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321250055 is a deficient number, since it is larger than the sum of its proper divisors (792750057).

1321250055 is an equidigital number, since it uses as much as digits as its factorization.

1321250055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88083345.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1321250055 is about 36349.0034939061. The cubic root of 1321250055 is about 1097.3074795097.

Adding to 1321250055 its reverse (5500521231), we get a palindrome (6821771286).

The spelling of 1321250055 in words is "one billion, three hundred twenty-one million, two hundred fifty thousand, fifty-five".