1379454721 has 8 divisors (see below), whose sum is σ = 1384314624. Its totient is φ = 1374603360.

The previous prime is 1379454719. The next prime is 1379454731. The reversal of 1379454721 is 1274549731.

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

It is a cyclic number.

It is not a de Polignac number, because 1379454721 - 2¹ = 1379454719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379454731) 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 7 ways as a sum of consecutive naturals, for example, 525805 + ... + 528421.

It is an arithmetic number, because the mean of its divisors is an integer number (173039328).

Almost surely, 2^1379454721 is an apocalyptic number.

It is an amenable number.

1379454721 is a deficient number, since it is larger than the sum of its proper divisors (4859903).

1379454721 is a wasteful number, since it uses less digits than its factorization.

1379454721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271.

The product of its digits is 211680, while the sum is 43.

The square root of 1379454721 is about 37141.0113082560. The cubic root of 1379454721 is about 1113.1896247890.

The spelling of 1379454721 in words is "one billion, three hundred seventy-nine million, four hundred fifty-four thousand, seven hundred twenty-one".