1456731221 has 12 divisors (see below), whose sum is σ = 1608410496. Its totient is φ = 1318338120.

The previous prime is 1456731217. The next prime is 1456731233. The reversal of 1456731221 is 1221376541.

It is not a de Polignac number, because 1456731221 - 2² = 1456731217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1456731281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11 + ... + 53976.

It is an arithmetic number, because the mean of its divisors is an integer number (134034208).

Almost surely, 2^1456731221 is an apocalyptic number.

1456731221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1456731221 is a deficient number, since it is larger than the sum of its proper divisors (151679275).

1456731221 is a wasteful number, since it uses less digits than its factorization.

1456731221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54232 (or 54221 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 1456731221 is about 38167.1484525632. The cubic root of 1456731221 is about 1133.5999273553.

The spelling of 1456731221 in words is "one billion, four hundred fifty-six million, seven hundred thirty-one thousand, two hundred twenty-one".