1356064221 has 8 divisors (see below), whose sum is σ = 1837726624. Its totient is φ = 889222320.

The previous prime is 1356064189. The next prime is 1356064243. The reversal of 1356064221 is 1224606531.

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

It is not a de Polignac number, because 1356064221 - 2⁵ = 1356064189 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 (1356064271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3704911 + ... + 3705276.

It is an arithmetic number, because the mean of its divisors is an integer number (229715828).

Almost surely, 2^1356064221 is an apocalyptic number.

It is an amenable number.

1356064221 is a deficient number, since it is larger than the sum of its proper divisors (481662403).

1356064221 is an equidigital number, since it uses as much as digits as its factorization.

1356064221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7410251.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1356064221 is about 36824.7772702022. Note that the first 3 decimals coincide. The cubic root of 1356064221 is about 1106.8618505327.

The spelling of 1356064221 in words is "one billion, three hundred fifty-six million, sixty-four thousand, two hundred twenty-one".