1398542 has 4 divisors (see below), whose sum is σ = 2097816. Its totient is φ = 699270.

The previous prime is 1398541. The next prime is 1398557. The reversal of 1398542 is 2458931.

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

It is a junction number, because it is equal to n+sod(n) for n = 1398499 and 1398508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398541) 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 as a sum of consecutive naturals, namely, 349634 + ... + 349637.

It is an arithmetic number, because the mean of its divisors is an integer number (524454).

2^1398542 is an apocalyptic number.

1398542 is a deficient number, since it is larger than the sum of its proper divisors (699274).

1398542 is an equidigital number, since it uses as much as digits as its factorization.

1398542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699273.

The product of its digits is 8640, while the sum is 32.

The square root of 1398542 is about 1182.5996786741. The cubic root of 1398542 is about 111.8300462317.

The spelling of 1398542 in words is "one million, three hundred ninety-eight thousand, five hundred forty-two".