1377482721 has 16 divisors (see below), whose sum is σ = 1878898944. Its totient is φ = 897260544.

The previous prime is 1377482713. The next prime is 1377482747. The reversal of 1377482721 is 1272847731.

It is not a de Polignac number, because 1377482721 - 2³ = 1377482713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1377482791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78465 + ... + 94401.

It is an arithmetic number, because the mean of its divisors is an integer number (117431184).

Almost surely, 2^1377482721 is an apocalyptic number.

It is an amenable number.

1377482721 is a deficient number, since it is larger than the sum of its proper divisors (501416223).

1377482721 is a wasteful number, since it uses less digits than its factorization.

1377482721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16600.

The product of its digits is 131712, while the sum is 42.

The square root of 1377482721 is about 37114.4543405935. The cubic root of 1377482721 is about 1112.6589182732.

The spelling of 1377482721 in words is "one billion, three hundred seventy-seven million, four hundred eighty-two thousand, seven hundred twenty-one".