1945198 has 4 divisors (see below), whose sum is σ = 2917800. Its totient is φ = 972598.

The previous prime is 1945183. The next prime is 1945199. The reversal of 1945198 is 8915491.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486298 + ... + 486301.

It is an arithmetic number, because the mean of its divisors is an integer number (729450).

2^1945198 is an apocalyptic number.

1945198 is a deficient number, since it is larger than the sum of its proper divisors (972602).

1945198 is an equidigital number, since it uses as much as digits as its factorization.

1945198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972601.

The product of its digits is 12960, while the sum is 37.

The square root of 1945198 is about 1394.7035527308. The cubic root of 1945198 is about 124.8306613657.

The spelling of 1945198 in words is "one million, nine hundred forty-five thousand, one hundred ninety-eight".