1398965 has 8 divisors (see below), whose sum is σ = 1699488. Its totient is φ = 1105360.

The previous prime is 1398911. The next prime is 1398967. The reversal of 1398965 is 5698931.

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

It is a de Polignac number, because none of the positive numbers 2^k-1398965 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398967) 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 7 ways as a sum of consecutive naturals, for example, 1271 + ... + 2100.

It is an arithmetic number, because the mean of its divisors is an integer number (212436).

2^1398965 is an apocalyptic number.

It is an amenable number.

1398965 is a deficient number, since it is larger than the sum of its proper divisors (300523).

1398965 is an equidigital number, since it uses as much as digits as its factorization.

1398965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459.

The product of its digits is 58320, while the sum is 41.

The square root of 1398965 is about 1182.7785084284. The cubic root of 1398965 is about 111.8413197201.

The spelling of 1398965 in words is "one million, three hundred ninety-eight thousand, nine hundred sixty-five".