1274253221 has 4 divisors (see below), whose sum is σ = 1341319200. Its totient is φ = 1207187244.

The previous prime is 1274253203. The next prime is 1274253223. The reversal of 1274253221 is 1223524721.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1274253221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1274253223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 33532961 + ... + 33532998.

It is an arithmetic number, because the mean of its divisors is an integer number (335329800).

Almost surely, 2^1274253221 is an apocalyptic number.

It is an amenable number.

1274253221 is a deficient number, since it is larger than the sum of its proper divisors (67065979).

1274253221 is an equidigital number, since it uses as much as digits as its factorization.

1274253221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67065978.

The product of its digits is 6720, while the sum is 29.

The square root of 1274253221 is about 35696.6836134675. The cubic root of 1274253221 is about 1084.1396964724.

Adding to 1274253221 its reverse (1223524721), we get a palindrome (2497777942).

The spelling of 1274253221 in words is "one billion, two hundred seventy-four million, two hundred fifty-three thousand, two hundred twenty-one".