1275214321 has 4 divisors (see below), whose sum is σ = 1304870512. Its totient is φ = 1245558132.

The previous prime is 1275214307. The next prime is 1275214331. The reversal of 1275214321 is 1234125721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1234125721 = 24841 ⋅49681.

It is a cyclic number.

It is not a de Polignac number, because 1275214321 - 2⁵ = 1275214289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1275214321.

It is not an unprimeable number, because it can be changed into a prime (1275214301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14828031 + ... + 14828116.

It is an arithmetic number, because the mean of its divisors is an integer number (326217628).

Almost surely, 2^1275214321 is an apocalyptic number.

It is an amenable number.

1275214321 is a deficient number, since it is larger than the sum of its proper divisors (29656191).

1275214321 is an equidigital number, since it uses as much as digits as its factorization.

1275214321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29656190.

The product of its digits is 3360, while the sum is 28.

The square root of 1275214321 is about 35710.1431108866. The cubic root of 1275214321 is about 1084.4121972042.

The spelling of 1275214321 in words is "one billion, two hundred seventy-five million, two hundred fourteen thousand, three hundred twenty-one".