1387147 has 2 divisors, whose sum is σ = 1387148. Its totient is φ = 1387146.

The previous prime is 1387129. The next prime is 1387151. The reversal of 1387147 is 7417831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387147 - 2¹¹ = 1385099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693573 + 693574.

It is an arithmetic number, because the mean of its divisors is an integer number (693574).

2^1387147 is an apocalyptic number.

1387147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387147 is an equidigital number, since it uses as much as digits as its factorization.

1387147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 1387147 is about 1177.7720492523. The cubic root of 1387147 is about 111.5254957214.

The spelling of 1387147 in words is "one million, three hundred eighty-seven thousand, one hundred forty-seven".