1387601 has 2 divisors, whose sum is σ = 1387602. Its totient is φ = 1387600.

The previous prime is 1387597. The next prime is 1387649. The reversal of 1387601 is 1067831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 274576 = 1055^2 + 524^2 .

It is an emirp because it is prime and its reverse (1067831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1387601 - 2² = 1387597 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1387681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693800 + 693801.

It is an arithmetic number, because the mean of its divisors is an integer number (693801).

2^1387601 is an apocalyptic number.

It is an amenable number.

1387601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387601 is an equidigital number, since it uses as much as digits as its factorization.

1387601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1387601 is about 1177.9647702712. The cubic root of 1387601 is about 111.5376614717.

The spelling of 1387601 in words is "one million, three hundred eighty-seven thousand, six hundred one".