1353226721 has 16 divisors (see below), whose sum is σ = 1775938560. Its totient is φ = 998963280.

The previous prime is 1353226717. The next prime is 1353226729. The reversal of 1353226721 is 1276223531.

It is not a de Polignac number, because 1353226721 - 2² = 1353226717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1353226729) 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 15 ways as a sum of consecutive naturals, for example, 461021 + ... + 463946.

It is an arithmetic number, because the mean of its divisors is an integer number (110996160).

Almost surely, 2^1353226721 is an apocalyptic number.

1353226721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1353226721 is a deficient number, since it is larger than the sum of its proper divisors (422711839).

1353226721 is a wasteful number, since it uses less digits than its factorization.

1353226721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925004.

The product of its digits is 15120, while the sum is 32.

The square root of 1353226721 is about 36786.2300460376. The cubic root of 1353226721 is about 1106.0892928114.

The spelling of 1353226721 in words is "one billion, three hundred fifty-three million, two hundred twenty-six thousand, seven hundred twenty-one".