1380120247 has 4 divisors (see below), whose sum is σ = 1505585736. Its totient is φ = 1254654760.

The previous prime is 1380120227. The next prime is 1380120277. The reversal of 1380120247 is 7420210831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1380120247 - 2¹⁵ = 1380087479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380120227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62732728 + ... + 62732749.

It is an arithmetic number, because the mean of its divisors is an integer number (376396434).

Almost surely, 2^1380120247 is an apocalyptic number.

1380120247 is a deficient number, since it is larger than the sum of its proper divisors (125465489).

1380120247 is a wasteful number, since it uses less digits than its factorization.

1380120247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125465488.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1380120247 is about 37149.9696769728. The cubic root of 1380120247 is about 1113.3686176223.

The spelling of 1380120247 in words is "one billion, three hundred eighty million, one hundred twenty thousand, two hundred forty-seven".