1201998 has 16 divisors (see below), whose sum is σ = 2747520. Its totient is φ = 343416.

The previous prime is 1201969. The next prime is 1201999. The reversal of 1201998 is 8991021.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201999) 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, 14268 + ... + 14351.

It is an arithmetic number, because the mean of its divisors is an integer number (171720).

2^1201998 is an apocalyptic number.

1201998 is an abundant number, since it is smaller than the sum of its proper divisors (1545522).

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

1201998 is a wasteful number, since it uses less digits than its factorization.

1201998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28631.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1201998 is about 1096.3566937817. The cubic root of 1201998 is about 106.3248017666.

The spelling of 1201998 in words is "one million, two hundred one thousand, nine hundred ninety-eight".