1387201 has 4 divisors (see below), whose sum is σ = 1410004. Its totient is φ = 1364400.

The previous prime is 1387189. The next prime is 1387207. The reversal of 1387201 is 1027831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1027831 = 7 ⋅146833.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 1311025 = 276^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387201 - 2¹⁹ = 862913 is a prime.

It is a super-2 number, since 2×1387201² = 3848653228802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11310 + ... + 11431.

It is an arithmetic number, because the mean of its divisors is an integer number (352501).

2^1387201 is an apocalyptic number.

It is an amenable number.

1387201 is a deficient number, since it is larger than the sum of its proper divisors (22803).

1387201 is an equidigital number, since it uses as much as digits as its factorization.

1387201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22802.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1387201 is about 1177.7949736690. The cubic root of 1387201 is about 111.5269428881.

The spelling of 1387201 in words is "one million, three hundred eighty-seven thousand, two hundred one".