1383551 has 4 divisors (see below), whose sum is σ = 1489992. Its totient is φ = 1277112.

The previous prime is 1383521. The next prime is 1383553. The reversal of 1383551 is 1553831.

1383551 = T₁₄₈ + T₁₄₉ + ... + T₂₂₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1553831 = 383 ⋅4057.

It is a cyclic number.

It is not a de Polignac number, because 1383551 - 2¹⁰ = 1382527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1383551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383553) 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 in 3 ways as a sum of consecutive naturals, for example, 53201 + ... + 53226.

It is an arithmetic number, because the mean of its divisors is an integer number (372498).

2^1383551 is an apocalyptic number.

1383551 is a deficient number, since it is larger than the sum of its proper divisors (106441).

1383551 is a wasteful number, since it uses less digits than its factorization.

1383551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106440.

The product of its digits is 1800, while the sum is 26.

The square root of 1383551 is about 1176.2444473833. The cubic root of 1383551 is about 111.4290404946.

The spelling of 1383551 in words is "one million, three hundred eighty-three thousand, five hundred fifty-one".