1251198 has 24 divisors (see below), whose sum is σ = 2920008. Its totient is φ = 384912.

The previous prime is 1251179. The next prime is 1251227. The reversal of 1251198 is 8911521.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2440 + ... + 2907.

It is an arithmetic number, because the mean of its divisors is an integer number (121667).

2^1251198 is an apocalyptic number.

1251198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1251198 is an abundant number, since it is smaller than the sum of its proper divisors (1668810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251198 is a wasteful number, since it uses less digits than its factorization.

1251198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5368 (or 5365 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 1251198 is about 1118.5696223302. The cubic root of 1251198 is about 107.7561370169.

The spelling of 1251198 in words is "one million, two hundred fifty-one thousand, one hundred ninety-eight".