1398951 has 28 divisors (see below), whose sum is σ = 2229720. Its totient is φ = 874800.

The previous prime is 1398911. The next prime is 1398967. The reversal of 1398951 is 1598931.

It is a happy number.

It is not a de Polignac number, because 1398951 - 2¹¹ = 1396903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398911) 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 27 ways as a sum of consecutive naturals, for example, 13801 + ... + 13901.

2^1398951 is an apocalyptic number.

1398951 is a deficient number, since it is larger than the sum of its proper divisors (830769).

1398951 is an equidigital number, since it uses as much as digits as its factorization.

1398951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 123 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1398951 is about 1182.7725901457. The cubic root of 1398951 is about 111.8409466386.

The spelling of 1398951 in words is "one million, three hundred ninety-eight thousand, nine hundred fifty-one".