1221294674 has 4 divisors (see below), whose sum is σ = 1831942014. Its totient is φ = 610647336.

The previous prime is 1221294653. The next prime is 1221294677. The reversal of 1221294674 is 4764921221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4764921221 = 433 ⋅11004437.

It can be written as a sum of positive squares in only one way, i.e., 1215568225 + 5726449 = 34865^2 + 2393^2 .

It is not an unprimeable number, because it can be changed into a prime (1221294677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305323667 + ... + 305323670.

Almost surely, 2^1221294674 is an apocalyptic number.

1221294674 is a deficient number, since it is larger than the sum of its proper divisors (610647340).

1221294674 is an equidigital number, since it uses as much as digits as its factorization.

1221294674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610647339.

The product of its digits is 48384, while the sum is 38.

The square root of 1221294674 is about 34947.0266832530. The cubic root of 1221294674 is about 1068.9075740261.

The spelling of 1221294674 in words is "one billion, two hundred twenty-one million, two hundred ninety-four thousand, six hundred seventy-four".