1374366721 has 16 divisors (see below), whose sum is σ = 1707059200. Its totient is φ = 1077427008.

The previous prime is 1374366689. The next prime is 1374366787. The reversal of 1374366721 is 1276634731.

It is not a de Polignac number, because 1374366721 - 2⁵ = 1374366689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1374366421) 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, 59361 + ... + 79198.

It is an arithmetic number, because the mean of its divisors is an integer number (106691200).

Almost surely, 2^1374366721 is an apocalyptic number.

It is an amenable number.

1374366721 is a deficient number, since it is larger than the sum of its proper divisors (332692479).

1374366721 is a wasteful number, since it uses less digits than its factorization.

1374366721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138688.

The product of its digits is 127008, while the sum is 40.

The square root of 1374366721 is about 37072.4523197482. The cubic root of 1374366721 is about 1111.8193039315.

The spelling of 1374366721 in words is "one billion, three hundred seventy-four million, three hundred sixty-six thousand, seven hundred twenty-one".