1387533 has 12 divisors (see below), whose sum is σ = 2152320. Its totient is φ = 792792.

The previous prime is 1387531. The next prime is 1387571. The reversal of 1387533 is 3357831.

It is not a de Polignac number, because 1387533 - 2¹ = 1387531 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4573 + ... + 4866.

It is an arithmetic number, because the mean of its divisors is an integer number (179360).

2^1387533 is an apocalyptic number.

It is an amenable number.

1387533 is a deficient number, since it is larger than the sum of its proper divisors (764787).

1387533 is an equidigital number, since it uses as much as digits as its factorization.

1387533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9456 (or 9449 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 1387533 is about 1177.9359065756. The cubic root of 1387533 is about 111.5358394579.

The spelling of 1387533 in words is "one million, three hundred eighty-seven thousand, five hundred thirty-three".