1398545 has 4 divisors (see below), whose sum is σ = 1678260. Its totient is φ = 1118832.

The previous prime is 1398541. The next prime is 1398557. The reversal of 1398545 is 5458931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 919681 + 478864 = 959^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398545 - 2² = 1398541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139850 + ... + 139859.

It is an arithmetic number, because the mean of its divisors is an integer number (419565).

2^1398545 is an apocalyptic number.

It is an amenable number.

1398545 is a deficient number, since it is larger than the sum of its proper divisors (279715).

1398545 is an equidigital number, since it uses as much as digits as its factorization.

1398545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279714.

The product of its digits is 21600, while the sum is 35.

The square root of 1398545 is about 1182.6009470654. The cubic root of 1398545 is about 111.8301261935.

The spelling of 1398545 in words is "one million, three hundred ninety-eight thousand, five hundred forty-five".