1398957 has 8 divisors (see below), whose sum is σ = 2131776. Its totient is φ = 799392.

The previous prime is 1398911. The next prime is 1398967. The reversal of 1398957 is 7598931.

It is a happy number.

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

It is not a de Polignac number, because 1398957 - 2⁸ = 1398701 is a prime.

1398957 is a lucky number.

It is a plaindrome in base 16.

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, 33288 + ... + 33329.

It is an arithmetic number, because the mean of its divisors is an integer number (266472).

2^1398957 is an apocalyptic number.

It is an amenable number.

1398957 is a deficient number, since it is larger than the sum of its proper divisors (732819).

1398957 is an equidigital number, since it uses as much as digits as its factorization.

1398957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66627.

The product of its digits is 68040, while the sum is 42.

The square root of 1398957 is about 1182.7751265562. The cubic root of 1398957 is about 111.8411065310.

The spelling of 1398957 in words is "one million, three hundred ninety-eight thousand, nine hundred fifty-seven".