1290198 has 64 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 317952.

The previous prime is 1290173. The next prime is 1290199. The reversal of 1290198 is 8910921.

It is a super-2 number, since 2×1290198² = 3329221758408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9213 + ... + 9351.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2^1290198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1290198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693440).

1290198 is an abundant number, since it is smaller than the sum of its proper divisors (2096682).

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

1290198 is a wasteful number, since it uses less digits than its factorization.

1290198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

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

The square root of 1290198 is about 1135.8688304553. The cubic root of 1290198 is about 108.8642925764.

The spelling of 1290198 in words is "one million, two hundred ninety thousand, one hundred ninety-eight".