1901198 has 16 divisors (see below), whose sum is σ = 3111696. Its totient is φ = 865920.

The previous prime is 1901191. The next prime is 1901201. The reversal of 1901198 is 8911091.

It is a super-2 number, since 2×1901198² = 7229107670408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1901198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1718 + ... + 2598.

It is an arithmetic number, because the mean of its divisors is an integer number (194481).

2^1901198 is an apocalyptic number.

1901198 is a deficient number, since it is larger than the sum of its proper divisors (1210498).

1901198 is a wasteful number, since it uses less digits than its factorization.

1901198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1901198 is about 1378.8393670040. The cubic root of 1901198 is about 123.8822590318.

The spelling of 1901198 in words is "one million, nine hundred one thousand, one hundred ninety-eight".