1387501 has 2 divisors, whose sum is σ = 1387502. Its totient is φ = 1387500.

The previous prime is 1387499. The next prime is 1387517. The reversal of 1387501 is 1057831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 30276 = 1165^2 + 174^2 .

It is an emirp because it is prime and its reverse (1057831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1387501 - 2¹ = 1387499 is a prime.

Together with 1387499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387531) 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 as a sum of consecutive naturals, namely, 693750 + 693751.

It is an arithmetic number, because the mean of its divisors is an integer number (693751).

2^1387501 is an apocalyptic number.

It is an amenable number.

1387501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387501 is an equidigital number, since it uses as much as digits as its factorization.

1387501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1387501 is about 1177.9223234153. The cubic root of 1387501 is about 111.5349820190.

The spelling of 1387501 in words is "one million, three hundred eighty-seven thousand, five hundred one".