1389451 has 16 divisors (see below), whose sum is σ = 1730560. Its totient is φ = 1088640.

The previous prime is 1389439. The next prime is 1389469. The reversal of 1389451 is 1549831.

It is not a de Polignac number, because 1389451 - 2¹¹ = 1387403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

1389451 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3955 + ... + 4291.

It is an arithmetic number, because the mean of its divisors is an integer number (108160).

2^1389451 is an apocalyptic number.

1389451 is a deficient number, since it is larger than the sum of its proper divisors (341109).

1389451 is a wasteful number, since it uses less digits than its factorization.

1389451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its digits is 4320, while the sum is 31.

The square root of 1389451 is about 1178.7497613998. The cubic root of 1389451 is about 111.5872081449.

The spelling of 1389451 in words is "one million, three hundred eighty-nine thousand, four hundred fifty-one".