1398465 has 24 divisors (see below), whose sum is σ = 2515968. Its totient is φ = 745200.

The previous prime is 1398451. The next prime is 1398473. The reversal of 1398465 is 5648931.

It is not a de Polignac number, because 1398465 - 2⁶ = 1398401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 640 + ... + 1790.

It is an arithmetic number, because the mean of its divisors is an integer number (104832).

2^1398465 is an apocalyptic number.

1398465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1398465 is a deficient number, since it is larger than the sum of its proper divisors (1117503).

1398465 is an equidigital number, since it uses as much as digits as its factorization.

1398465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1159 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1398465 is about 1182.5671228307. The cubic root of 1398465 is about 111.8279938391.

The spelling of 1398465 in words is "one million, three hundred ninety-eight thousand, four hundred sixty-five".