1385551 has 8 divisors (see below), whose sum is σ = 1479600. Its totient is φ = 1292928.

The previous prime is 1385521. The next prime is 1385561. The reversal of 1385551 is 1555831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385551 - 2⁹ = 1385039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2260 + ... + 2806.

It is an arithmetic number, because the mean of its divisors is an integer number (184950).

2^1385551 is an apocalyptic number.

1385551 is a deficient number, since it is larger than the sum of its proper divisors (94049).

1385551 is a wasteful number, since it uses less digits than its factorization.

1385551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713.

The product of its digits is 3000, while the sum is 28.

The square root of 1385551 is about 1177.0943037837. The cubic root of 1385551 is about 111.4827069375.

It can be divided in two parts, 1385 and 551, that added together give a square (1936 = 44²).

The spelling of 1385551 in words is "one million, three hundred eighty-five thousand, five hundred fifty-one".