1551198 has 32 divisors (see below), whose sum is σ = 3565440. Its totient is φ = 444960.

The previous prime is 1551197. The next prime is 1551203. The reversal of 1551198 is 8911551.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636 + ... + 1872.

It is an arithmetic number, because the mean of its divisors is an integer number (111420).

2^1551198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1782720).

1551198 is an abundant number, since it is smaller than the sum of its proper divisors (2014242).

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

1551198 is a wasteful number, since it uses less digits than its factorization.

1551198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272.

The product of its digits is 1800, while the sum is 30.

The square root of 1551198 is about 1245.4709952464. The cubic root of 1551198 is about 115.7592609371.

The spelling of 1551198 in words is "one million, five hundred fifty-one thousand, one hundred ninety-eight".