1390845 has 8 divisors (see below), whose sum is σ = 2225376. Its totient is φ = 741776.

The previous prime is 1390841. The next prime is 1390847. The reversal of 1390845 is 5480931.

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 1390845 - 2² = 1390841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390841) 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 7 ways as a sum of consecutive naturals, for example, 46347 + ... + 46376.

It is an arithmetic number, because the mean of its divisors is an integer number (278172).

2^1390845 is an apocalyptic number.

1390845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1390845 is a deficient number, since it is larger than the sum of its proper divisors (834531).

1390845 is an equidigital number, since it uses as much as digits as its factorization.

1390845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92731.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1390845 is about 1179.3409176315. The cubic root of 1390845 is about 111.6245131851.

The spelling of 1390845 in words is "one million, three hundred ninety thousand, eight hundred forty-five".