1387149 has 16 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 853760.

The previous prime is 1387147. The next prime is 1387151. The reversal of 1387149 is 9417831.

It is an interprime number because it is at equal distance from previous prime (1387147) and next prime (1387151).

It is a cyclic number.

It is not a de Polignac number, because 1387149 - 2¹ = 1387147 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2779 + ... + 3239.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

2^1387149 is an apocalyptic number.

It is an amenable number.

1387149 is a deficient number, since it is larger than the sum of its proper divisors (608691).

1387149 is a wasteful number, since it uses less digits than its factorization.

1387149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its digits is 6048, while the sum is 33.

The square root of 1387149 is about 1177.7728983127. The cubic root of 1387149 is about 111.5255493209.

The spelling of 1387149 in words is "one million, three hundred eighty-seven thousand, one hundred forty-nine".