1611221474 has 8 divisors (see below), whose sum is σ = 2417273820. Its totient is φ = 805463536.

The previous prime is 1611221467. The next prime is 1611221503. The reversal of 1611221474 is 4741221161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1563016225 + 48205249 = 39535^2 + 6943^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59369 + ... + 82140.

Almost surely, 2^1611221474 is an apocalyptic number.

1611221474 is a deficient number, since it is larger than the sum of its proper divisors (806052346).

1611221474 is a wasteful number, since it uses less digits than its factorization.

1611221474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147204.

The product of its digits is 2688, while the sum is 29.

The square root of 1611221474 is about 40140.0233432917. The cubic root of 1611221474 is about 1172.3350435252.

The spelling of 1611221474 in words is "one billion, six hundred eleven million, two hundred twenty-one thousand, four hundred seventy-four".