1387151 has 2 divisors, whose sum is σ = 1387152. Its totient is φ = 1387150.

The previous prime is 1387147. The next prime is 1387163. The reversal of 1387151 is 1517831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1387151 - 2² = 1387147 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693575 + 693576.

It is an arithmetic number, because the mean of its divisors is an integer number (693576).

2^1387151 is an apocalyptic number.

1387151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387151 is an equidigital number, since it uses as much as digits as its factorization.

1387151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 26.

The square root of 1387151 is about 1177.7737473726. The cubic root of 1387151 is about 111.5256029202.

The spelling of 1387151 in words is "one million, three hundred eighty-seven thousand, one hundred fifty-one".